I'm sure that at least some of the seminarians would say that they didn't vote for the anti-Christ because he favors an absolute and extreme abortion license, up to and including a little bit past the point of birth.
I'm sure that they would [lamely] make the case that they were voting for him because of his “commitment” to other “Catholic ideals,” such as feeding the poor, caring for the sick, etc., etc., etc. And against Gov. Romney because he's a fire-breathing, eat-poor-babies-and-drink-their-blood evil capitalist greedhead. Or something like that.
And the way that the Cardinal Dolan and the bishops have handled these questions, they'd be hard-pressed to make the case that these seminarians have done anything wrong.
However, we should also be careful not to denounce people for being evil when it's possible that they're merely stupid. Unrepentant evil people may often wind up in Hell, but there is no IQ requirement for getting into Heaven.
My own experience with young priests and seminarians (and not a few older priests, and even bishops) is that many of them are not necessarily the sharpest knives in the drawer. Thus, I'd chalk up part of this result that you cite as being the outcome of stupidity on the part of many.
sitetest
There is just plain stupidity, and there is the culpable stupidity that flows from intellectual sloth.