That's problematic. What's "the Establishment" exactly? And who is "us"? Should everyone with a political grievance resort to violence?
I do not think they should take you seriously because you will use violence - as in give in to your demands if that is what it is. But I think there are angry, hurting people on all sides...and I think there is a lot of inflammatory disinformation out there driving things as well. Our elected officials and two oversized parties need to take it seriously.
The Establishment are the Republicans and Democrats in the House and Senate who felt entitled to rule over "us," the rightwing conservatives who agree with (and some of whom actually did it) taking back the Capitol from these types for the people.
I think we have been despised heretofore because we're so "nice," and nonviolent. Note that when the blacks ran around burning and looting, everyone fell over themselves trying to give them everything they might want, including brainwashing sessions for employed people in which whites had to kiss black feet and apologize profusely; I don't know what for. This is all appeasement and it only provokes more violence, as we saw yesterday. We want some appeasement, too, if that's all that's going around.
So I do think that before yesterday no one took us seriously; now that our potential has become obvious, that may well change, and high time.