I agree that we should understand sexuality in all its forms, but I have to point out, that we have shared similar struggles is pretty much the only applicable link between homosexuals and pedophiles. There are distinguishing characteristics that set the two groups apart and I think that while it's true homosexuals share some of the same sort of struggles that pedophiles have, the differences between them are important.
Though I'm generally adverse to comparisons-to-make-a-point when it comes to this sort of thing anyway. Comparing gay people to African Americans during the civil rights movement, comparing, say... Bush or Obama to Hitler; these things just plainly miss the mark. I think I feel a bit of that in the pedophiles::homosexuals thing. There are important differences that set us apart and it seems like people are ignoring them when people say things like that.
Lookit: I guess you could say that Bush and Obama are like Hitler in that were/are controversial leaders of a country at war. They do have a link. But that link is under the oceans of difference between those men. Same for gay people and the civil rights movement. Yes, there's a similarity in that they're both social groups oppressed in some way by society that are fighting for their rights and equality. But again, the differences are staggering. Same deal with homosexuals and pedophiles. Yes, we've had similar struggles as sexualities that have been relegated to the bottom of the pyramid and have all sorts of nasty things floating around the social consciousness about them. But we are very different.
And those differences are important when we're talking about the gay rights movement.
Actually, I find in the gay right movement is where the differences matter the least. That is to say (as seen in the pedophilia and teaching thread), excluding the issue of gay marriage, many of the things homosexuals are fighting for are the same things I would think pedophiles would also want.
For example, part of the gay movement is to stop the discrimination in the military. The few stories I have read about a pedophile being found out in the military (in cases where he has done nothing wrong, for example he spoke about his attractions with a chaplain, who turned around and outed him), he gets mistreated extensively.
Gays are fighting to not be fired from jobs just because they are gays. I would think that a pedophile who came out would run the same risk, and would even guess that they run it to a greater extent.
Gays are fighting so that they will not be assaulted just for being gay. I would think that pedophiles who are open about it have quite a high chance of being assaulted as well.
Remember, it is not the homosexual only movement, it is the GLBT(Q) movement, which includes more than homosexuals, but many groups who are outcast because of their sexuality. Is it so hard to add a P on the end of that movement?
As to the comparisons you mention, I find comparing the fight for homosexual marriage similar to the fight for interracial marriage.
Also, I do compare Obama and Hitler. They were (well, Obama is) great speakers. Besides for that, there is little of comparison that makes sense.