To me, what it comes down to is if they're ok with what they're going to endure. I'd say it's pretty evident that people (teammates/fans/opponents) will give them crap for being gay. If they can handle that, fine. There's more to it than "I think it's morally acceptable and you don't." You have to measure repercussions, as I would like to think most people do with most any decision, but that's far from the truth. I don't care if a guy or girl is gay. If a guy were to kiss another guy in front of me, that would make me uncomfortable though. But if two ugly people kissed that would too. Because kissing, whether or not it is a simple form of affection, has sexual connotations, however small that may be. So basically anything with sexual connotations is going to bother me if it's not someone I'm sexually attracted to. It's just a matter of comfort. I can deal with it if it happens though, that's on me. But if you are openly acting on your desires or instincts, knowing it will make majority of people uncomfortable, that's on you. You can't just forget about other people either. For instance, I like to listen to some bands my wife doesn't like, so when she's around, for the most part, I try not to listen to them. I didn't make a choice to like Nick Cave's music, I just heard it and was attracted to the music, but that doesn't mean I should forego her desires as well just because I want to act on mine. So coming out, I think is fine if you've weighed the pros and cons and find that it being known that you're gay will work better than keeping it to yourself. But being "openly gay" to the extent of kissing another guy after practice is a completely different ball of worms. If everyone there, or majority of people there are fine with it, by all means, but you can't just say "hey, it's ok to do this anywhere".
Also, if you're ragging on someone else for their religious beliefs, that is no better than that person ragging on someone for being gay. Let people believe what they want to believe. It's how and where they practice their beliefs is the issue.
I am a Christian, btw, but I believe people make their own decisions. One thing that bothers me is when Christians get all preachy to non-believers of the faith. If they haven't become a Christian in their lives by now, why would they just because you asked them to? Or when Christian ministries send bibles to ravaged areas instead of food. That seems ridiculous.
I didn't vote for anything though. I wouldn't want the person booted from the team, but I'm not a person that will fight for gay rights either. I'm kind of indifferent, as it's their prerogative, why should I care? I'm not going to get all upset if it was revealed Jared Crick has a thing for women over 85 or if Carl Pelini likes pickles rubbed all over his feet before he gets it on.