"the son of man came eating and drinking grapejuice"Do you know how stupid and unbiblical a statement that is? You may not drink alcholol as I don't either, but creating lies to create false doctrines is a heresy (though that is I suppose normal on this Calvinist heresy site I guess).
Jesus made aged wine (aka "the good stuff"), not grape juice.
Jhn 2:10 And saith unto him, Every man at the beginning doth set forth good wine; and when men have well drunk, then that which is worse: [but] thou hast kept the good wine until now.
Drinking wine (no, not only grape juice) is also supported elsewhere.
1 Tim 5:23 Drink no longer water, but use a little wine for thy stomach's sake and thine often infirmities.
And no that does not mean drinking until drunk, but it does means drinking alcholol.
So even if you don't drink it, don't deny it, or you will be found out to be a liar every time.