If Democrats had an equivalent to MTG in Congress somehow, we wouldn't need Republicans to keep him/her out of Comittees. We'd do it ourselves in a heartbeat. Liz's threat means nothing.
The threat is that when the GOP has control, they'll remove committee assignments from Ilhan Omar, Rashida Tlaib, Cori Bush, or some other people Fox News is mad at. And if they have the majority, they can do that and there's nothing Dems can do about it.
Did any of those people support execution/death of other House members?
Doesn't matter -it's all about false equivalencies for Republicans. For them, any of these names are the moral equals of Marjorie Taylor Greene.