AC...Thats got nothing to do with mental illness.
People who are genuinely affected with depressive & anxiety based afflictions shouldnt be pigeonholed into the same stereotype as this behavior.
These links you put up are just the result of everyday cult like indoctrination that goes on in almost every facet of life...like firearms, climate change, sexism, racism religion & all levels of polotics.
Most of those people arent mentally ill, theyre just not educated in how to think for themselves.
They are infact being abused by the people leading them....
To be honest, i get what you're coming from, but you need to think a little deeper about what you say...because grouping these people into the generally described 'mental illness' bucket is almost being as naive & bigoted as those you speak about.
Whats going on in these links is a cultural problem & has nothing (directly) to do with what we call 'mental illness'.

The man who knows everything, doesnt really know everything...he's just stopped learning...