The question is: what exactly constitutes idolatry?
Idolatry, one of the worst biblical sins,
can take on many forms. In the Ten Commandments, it is touched upon briefly in
the nature of a physical image:
Exodus 20:4 Thou shalt not make unto thee any graven image, or any likeness [of any thing] that [is] in heaven above, or that [is] in the earth beneath, or that [is] in the water under the earth:  Thou shalt not bow down thyself to them, nor serve them: for I the LORD thy G-d [am] a jealous G-d, visiting the iniquity of the fathers upon the children unto the third and fourth [generation] of them that hate me;  And shewing mercy unto thousands of them that love me, and keep my commandments. (KJV)
Deuteronomy 17:2 If there will be found among you in one of your cities, which HASHEM, your G-d, gives you, a man or woman who commits what is evil in the eyes of HASHEM, your G-d, to violate His covenant,  and he will go and serve gods of others and prostrate himself to them, or to the sun or the moon to any host of heaven, which I have no commanded,  and it will be told to you and you will hear; then you shall investigate well, and behold! It is true, the testimony is correct – this abomination was done in Israel –  then you shall remove that man or that woman who did this evil thing to your cities – the man or the woman – and you shall pelt them with stones, so that they will die.  By the testimony of two witnesses or three witnesses shall the condemned person be put to death; he shall not be put to death by the testimony of a single witness.  The hand of the witnesses shall be upon him first to put him to death, and the hand of the entire people afterward, and you shall destroy the evil from your midst. (Artscroll)
We concur on the definition of idolatry. Now, what Mike must do is show that Christians are guilty of idolatry. By the end of this webpage, it will be clear that he has not.
Numbers 23:19 G-d [is] not a man, that he should lie; neither the son of man, that he should repent: hath he said, and shall he not do [it]? Or hath he spoken, and shall he not make it good? (KJV)
Well, yes, at the time of the writing of the Torah, God was not a Man, does this mean He will never become a Man? Are we to limit what God can do or what He chooses to do? I would ask the reader this, when angels have "walked among us" were they angels (a spirit being) or men? I will refer the reader to Genesis 19:1-22.
Exodus 33:12 Moses said to HASHEM, "See, You say to me, ‘Take this people onward,’ but You did not inform me whom You will send with me; and You had said, ‘I shall know you by name, and you have also found favor in My eyes.’  And now, if I have indeed found favor in Your eyes, make Your ways known to me, so that I may comprehend Your ‘you have found favor in My eyes.’ But see that this nation is Your people."  He said, "My Presence will go and provide you rest."  He said to Him, "If Your Presence does not go along, do not bring us forward from here.  How, then, will it be known that I have found favor in Your eyes – I and Your people – unless You accompany us, and I and Your people will be made distinct from every people on the face of the earth!"  HASHEM said to Moses, "Even this thing of which you spoke I shall do, for you have found favor in My eyes, and I have known you by name."  He said, "Show me now Your glory."  He said, "I shall make all My goodness pass before you, and I shall call out with the Name HASHEM before you; I shall show favor when I choose to show favor, and I shall show mercy when I choose to show mercy."  He said, "You will not be able to see My face, for no human can see My face and live." (Artscroll)
1 Kings 8:27 But will G-d indeed dwell on the earth? behold, the heaven and heaven of heavens cannot contain thee; how much less this house that I have builded? (KJV)
Deuteronomy 4:12 HASHEM spoke to you from the midst of the fire; you were hearing the sound of words, but you were not seeing a likeness, only a sound. (Artscroll)
These are not difficult concepts to grasp. If G-d were to appear in physical form, how would you know it? No procedure for such recognition is found in the Torah. If G-d were to do it once, what's to stop any layman from producing a miracle and then claiming godhood?
You shall judge a tree by its fruit.
Deuteronomy 18:10 There shall not be found among you [any one] that maketh his son or his daughter to pass through the fire, [or] that useth divination, [or] an observer of times, or an enchanter, or a witch,  Or a charmer, or a consulter with familiar spirits, or a wizard, or a necromancer.  For all that do these things [are] an abomination unto the LORD: and because of these abominations the LORD thy G-d doth drive them out from before thee. (KJV)
Take note with this passage of why G-d tells us not to seek out these types of people or powers. He doesn't say that they are nonsense and not to be believed. We're not to seek them out because they're not holy. There are all kinds of evil powers out there. The Torah forbids them because they are unholy.
What then, did Jesus do that proves he's
the Almighty? He raised someone from the dead? Elijah and Elisha
both did that. Praying to Elijah and Elisha would also be idolatry.
If someone comes along, shows you a sign or wonder, then he might be a prophet,
and you should follow him. If he teaches something that goes against the
grain of what Moses taught, then he's a false prophet, and he should not be
feared. But there's no reason, no logic, no justification that can allow
someone to pray to a man.
I don't know why Mike uses this reference or implication toward Christianity. Is he accusing Jesus of being a divinator because He performed miracles? If so, this would be rather inconsistent of him because he states Jesus' miracles are no big deal because Elijah and Elisha also performed miracles. In fact, he seems to be admitting that Jesus did perform miracles. Elijah and Elisha's miracles were from God, so, by implication Jesus' miracles also came from God. I realize this was not his intention, but this shows a weakness of his argument.
So, what is Mike saying here anyway? Is he saying that it is impossible for God to become man? Christians do not limit God in this manner. If God so chose in His plan of salvation that He would become Man and allow Himself to become the ultimate Sacrifice to end the animal sacrifice of the Old Covenant - then who are we to question God?
Has Mike shown us anything that would make a Christian think that God did not become Man? Is there anything in Mike's essay that tells us that God doesn't love us so much that He would send His only Begotten Son to die for us, that whosoever believes in Him should not die, but have everlasting life? (John 3:16) No, there is nothing here to disuade a Christian from his/her faith.