Donald Trump was banned from Twitter. “Conservatives” were not. You are still free to engage in all manner of conservative speech on Twitter that does not call for violence against your ideological opponents.
I don't follow twitter, but it would be good to have some evidence.
To allow him to continue to engage in that same brinkmanship after violence has already occurred is allowing him to continue inciting violence, unintentional as it may be.
This is about a small group of people coming together whilst collectively possessing significant power on the fabric of society and choosing to erase an individual.