The posts in question are there to organize an armed assault next week, before the inauguration. The literal planning of an illegal act is where the "free exchange of ideas" argument falls flat.

Your rhetorical question reads to me no differently than "Why bother giving people freedom in the first place if we're just going to punish them whenever they murder someone? We might as well just drop the pretense and imprison everybody by default"

Some of the richest companies in the world are actively dedicated to pushing people to the fringes because they make more money that way. Blaming voters seems a little unfair to me.

We use to call representatives, particularly Senators, Statesmen. They were elected to represent the interests of their State [government] and not that of the people or themselves.

The voters voted out the current president. "Stop the steal" is an attempt to override the voters' decision.