While I agree when their jackassery is due to them being a racist/misogynist/homophobe/etc. that letting them stick around is a good sign the rest of those in power are also terrible, sometimes they are just a jackass because of having an abrasive personality or jumping into conversations and being annoying about some subject they care too much about. Think less malicious and more juvenile to the point that blocking them is necessary to enjoy the rest of the community.
I have found zero tolerance means that no place will be acceptable. But yes, if blocking is due to them being hateful then it isn't worth sticking around.