It's actually rather simple.
Wasn't she like in her 30s when she was still hatin' on the gayz?
That is why.
Social conservatives are dead on arrival amongst the Democratic base.
She’s still in her 30s lol, and supposedly had a change of heart after being elected to Congress. From her Wiki page:
In 2012, Gabbard apologized for her "anti-gay advocacy"[14] and said she would "fight for the repeal" of the Defense of Marriage Act (DOMA).[13] In June 2013, she was an initial cosponsor of the legislation to repeal DOMA.[236] After launching her presidential campaign in 2019, she apologized again and said that her views had been changed by her experience in the military "with LGBTQ service members both here at home and while deployed".[237][238] She has been a member of the House LGBT Equality Caucus during her first,[239] third,[240] and fourth[241] terms in Congress, and received a 100% rating in her third term (improving from 88% and 92% in her previous two terms) for pro-LGBT legislation from the Human Rights Campaign, a group that advocates for LGBT rights.[242]
