Related: https://www.newsweek.com/lisa-murkowski-donald-trump-retalia...
It's really just republicans are only unified in presenting a unified front so when it comes to actually doing something like electing a speaker [2] [3] the lack of alignment becomes obvious. So they aren't doing anything to counteract trump because they aren't as a whole unified in that it's something they want but they're unified in not fracturing and helping democrats.
[1]: https://en.wikipedia.org/wiki/United_States_Congress
[2]: https://en.wikipedia.org/wiki/January_2023_Speaker_of_the_Un...
[3]: https://en.wikipedia.org/wiki/October_2023_Speaker_of_the_Un...
Trump and his policies are to large extend logical extension of what republican party pushed for and wanted for years. Conservatives wanted exactly this, pressed for exactly this, made this happen. Plus, they are not just tolerating, they are actively defending it, sane-washing it more then mainstream media.
And yet also, they all have choices. They are not at risk the same way people living under dictatorship are. They made choice to support this party again and again, because they agree with it.