Well there's mob mentality, mass delusion and mass psychosis.
All are temporary conditions; being caught up at the moment, such as happened with the old couples looking for a restroom in Congress on 1/6.
How many of them quickly realized and admitted error? How many planned ahead? There's a wide gulf of difference between a mob and those who organize a mob, then spin it up and point it toward a target.
Still, once the mob is dispersed, how many people go back to normal and how many remain the same? There's the biggest difference. It's still a matter of individual choice.....not mind control.
The answer to the hypnosis question put to #10 is not unless the person is willing. People can't be hypnotized into murdering a person against their will.
In controlled conditions, yes, they can. Consider the old version of "The Manchurian Project". Under duress for an extended period of time, people will break. It's human. Outside the controlled environment, people return to their normal nature...the nature they choose...if they are normal. If they are mentally ill, then like asking a legless man to run, they can't. They need help.