I locked the first one because it had entered into a close/reopen and delete/undelete war which showed no signs of stopping. (While the same user can't participate in closing or reopening a question more than once, apparently there's no limit on the number of times one user can vote to delete or undelete the same post.)
As for why it was so controversial (very controversial indeed, to the point where at least one user threatened to quit the site if the question was allowed to remain): some of the phrasing made the question seem trolling and/or offensive. For example:
First, if you are thinking that this question is a joke or troll, I'd like to welcome you to the 21st century when the mankind is discussing legality of gay marriages.
Although his age is 80+, he is still young. Yet, he doesn't have a girlfriend and he doesn't show any interest in girls. Even when Black Widow kissed him, he didn't try to drag her to bed.
I'd rather not get into details of discussing that particular question, OP's intent, and all the history surrounding it. Suffice it to say that the community reacted very negatively due to other things than the simple question "Is Captain America gay".
The second question was also
controversial: although it has a positive score, that's split into +35 / -29
. In fact I believe it was an attempt to ask the underlying (reasonable) question "Is Captain America gay" in a way that the community would accept. Unfortunately, it received backlash precisely because of the older question. It was even closed as a duplicate and reopened
. There are 26 deleted comments on this question; a custom mod flag was raised calling it a troll question; it was even controversial enough that the OP disassociated it from their account.