It’s not that they don’t care - the current administration is targeting people that they specifically don’t like.
And Trump has a cult of personality where many Republican politicians are literally afraid for their lives if they stand against him because they get death threats.
Romney said other Republican politicians won’t stand against Trump because they can’t afford security like he can. Majorie Green Taylor said her family has started getting death threats and the Indiana legislators who were first opposed to redistricting are now holding a vote because they also got death threats