That's not an argument, I agree that Trump and terrorism is bad. That is not an argument for enacting policies in a collective fit of rage without thinking at all about long-term consequences.
They had to rewrite their content policies to give him a loophole a long time ago, since any normal person would be banned for what he said. They recently started having to add disclaimers, because even the loophole wasn't enough to counter his wrongness and influence.