As I stated, he's actually given a shit about the community for decades longer. It makes him feel far more genuine than Hillary who has only jumped on when it was okay by the majority for her to do so. And unlike any other fucking Democrat he actually gave a shit about trans-individuals even decades back. It's not revisionist. It's me stating the blatant facts.
Also, a little history:
"By all measures, Sanders was ahead of his time in supporting gay rights. In 1983, as mayor of Burlington, he signed a Gay Pride Day proclamation calling it a civil rights issue. He was one of just 67 members in the House of Representatives to vote against the Defense of Marriage Act, a politically tough decision he prides himself on and points to as a key progressive bona fide. Sanders opposed Dont Ask Dont Tell in 1993, another President Bill Clinton-era policy, and supported civil unions in Vermont in 2000."
"In 1999, the Vermont Supreme Court ruled that the state had to guarantee protections and benefits to gay couples, a stop short of legalizing gay marriage. Sanders approved of the decision."
Which just only starts to cover how he has been on the matter. Suffice it to say, he has been a supporter/pushed for legislation in many manners far earlier than most Democrats. Not all but most. And easily way before Hillary ever came around to the issue. He has spoken passionately for us on the Senate floor even back in the mid 90s when it was unpopular to do so. Given the options, I much rather support him than her on the matter.