It feels like political censorship because it is political censorship. Those with the "correct" political views can basically tell people to kill themselves, or worse, while Twitter turns a blind eye to literal terrorists (of the blowing themselves up with bombs variety) using their platform to spread their message.

You can say whatever you want about how terrible the people being banned supposedly were, but Twitter's priorities here are crystal clear. This was an ideological purge first and a (terribly subjective) ToS enforcement action second.