Most of the media ‘liberal lefties’ just don’t have any experience of or have read anything to move from the default status. They’re not bad people and have been brought up not to be racist, homophobic, non xenophobic their whole lives and think they’re doing good. Nobody likes a homophobe right?
When they read statements from esteemed organisations such as Stonewall, Amnesty, the UN etc they just swallow everything and take it as fact when people are portrayed as terfs, racists, nazis etc.
It just takes time and unfortunately the legislation will get enacted before the man / woman on the street is aware of what is happening or the consequences.
They will eventually though. It’s only unawareness which is enabling this. By the time people cotton on you won’t be able to criticise without being a nutter. I doubt Trump is popular he (doubt him personally but his party) rowed back on some trans right policies because it was him it just got lost in the anti immigrant, racist, homophobic rhetoric. People will rush to defend all sorts of looney transsexual stuff if It means opposing the Donald orange craziness. Obama’s bathroom bill left him all sorts of shit as was never formally enacted but any retreat would be viewed completely illiberal