Senator Tillis today: the independence and credibility of DOJ is what are in question, not the Fed or Fed chairman. And he says he will block Fed nominees until the legal matter is resolved.
Republicans are the majority party. The opposition party constituents need to persuade only a handful of Republicans in each house, get them to caucus with Democrats, and you have an entirely lawful, civil, non-violent way of opposing a president.
This has a greater chance of enduring success than expecting an increasing body count of people getting shot in the face to persuade more people to participate.
I am aware most Republicans in Congress were elected expressly to enable Trump. But accepting that as the intractable part of the problem? No, the intractable part is extracting more votes out of the party in the minority.