The Clinton's were fighting for gay rights in the 1990's at least, they just didn't publically come around to supporting gay marriage until soon after Obama did.
That is not true - They were one of the conservative & anti-gay people. Bill & Hillary supported the homophobic DOMA which Sanders voted against & 35% of Dems voted against. When Obama was for gay marriage, more than half of the Dem party was in favor of it.
Hillary was one of the last to change!
And Bernie joined with nearly half of Democrats in voting against DADT.
https://votesmart.org/bill/votes/15579#.VbfPT0JViko