It is disconcerting. Having discussed openly with people who were supportive of similar politicians, their logic is often in the line of "all of them are corrupt, but at least his politics are different". Now when you point that certainly corruption exists, but this is another level, they're getting into non-logical territory. People perceive times as grim and will take whomever offers something else than the status-quo baseline politician I guess. Even if they grift throughout and everyone's worse off in the end.

On a baser level, if you go on twitter, there's a whole slew of delusional people who either don't believe this because of "fake news", another portion that's in the same "Clinton/Obama/Biden were even worse", and the rest just doesn't even care so long as "the libs are owned".