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I just don't understand Calvin and Luther's opposing sides on the incarnation and kind of wanted to have it all in perspective.

I think the problem is rooted in their respective understandings of the presence of Christ in the Lord's Supper. Luther affirmed that Christ's body is present with the bread and the wine, saying that since He is God He can do anything. Calvin rejected this view, and seeking to affirm the true humanity of Chirst, he said that Christ's body is subject to spatial limitations just like ours, and is therefore locally present only in heaven, to which Christ ascended.

Kyle

I tell you, this man went down to his house justified.