The people prone to this thinking aren’t really able to objectively evaluate evidence, the idea is that it’s plainly true and you need to accept it as well. The evidence they usually provide assumes that you will also accept unfounded, baseless allegations as factually true and proven, and when you point out the logical inconsistencies they’ll just swap that out with another bad argument. It’s not really useful to attempt to rationally engage with them, they didn’t rationally come to their conclusions.