You are wrong. Neither marrying them nor hypocrisy is justifiable and I never said either one was. But doing the right thing because one is forced to do so is meaningless. Ultimately, everyone needs to decide what he/she believes him/herself. Each pastor leads his/her congregation and the pastor should be led by God, not another human. Ergo, the pastor needs to study the word and pray. Yes, he will be judged if he leads the congregation astray; that's why the Bible says not many should be teachers. It's a huge responsibility. But if the pastor is just reciting what other people tell him to, then his words are meaningless.
That being said, I'd seriously question any pastor who came to the conclusion that marrying two people of the same sex is according to God's will. But I still think that pastors need to be in charge of thinking out the tough questions themselves instead of relying on another human to tell him/her what to do. To do so cheapens the responsibility that comes with being the head of a congregation.
However, I think we may need to agree to disagree in this case.