If they didn't have brains to engage, we wouldn't be on the defensive having lost the media and the schools and universities. They've been playing the long game since at least the 60s, and we have been reacting and congratulating ourselves for every minor strategy we overcome while not even noticing the influence they've gathered.
If we simply guffaw and delcare them all brain dead, we will lose. They don't think the way we do, and they subscribe way more to a narrative than to facts and history, but they are smart enough to be a serious danger to our freedoms. I suggest you take them more seriously.
They lack a grasp of logic and they lack morals and ethics. But yes, they really do have something in their cranium.