"When people arrive at a group, their IQ drops seriously. In order to gain recognition, individuals are willing to abandon right and wrong and exchange their IQ for a sense of belonging that makes people feel safe. " It is not easy for people to keep sober cognition and independent thinking in groups. And some people just take advantage of this weakness and express their ideas through groups, which makes it hard to refuse. Not only in the group, even if only two people communicate face to face, the one with weak will may be influenced by the stronger one.
I hope I can help you.