I agree there's no place for violent rhetoric like that in politics or society as a whole. I've long been an advocate of deradicalizing American politics.
But again, the last thing you want to do if you want to shut someone up is take highly visible action against them. I equate it to a toddler wanting attention and throwing a tantrum. The worst thing you can do is give them attention. It just gives them what they want. When you have politicians out there saying outlandish or inflammatory things, the worst thing you can do is hand them the spotlight.
What needs to happen with MTG is she needs to be put quietly in a corner, given no attention, and given no chances to grab headlines. Then recruit a well funded and well qualified primary challenger.