What WSB crowd is doing is market manipulation. That's illegal. WSB is doing everything openly and even celebrating it. Getting mad when openly breaking the law is not rational response. https://www.law.cornell.edu/uscode/text/15/78i
Brokers like Robinhood are reacting because they want too keep SEC out of their asses and prevent SEC doing something even worse to their customers.
Stock Markets like nasdaq are reacting to volatility, like they usually do in abnormal situation.