https://en.wikipedia.org/wiki/Drinking_the_Kool-Aid
>"Drinking the Kool-Aid" is an expression used to refer to a person who believes in a possibly doomed or dangerous idea because of perceived potential high rewards. The phrase often carries a negative connotation. It can also be used ironically or humorously to refer to accepting an idea or changing a preference due to popularity, peer pressure, or persuasion. In recent years it has evolved further to mean extreme dedication to a cause or purpose, so extreme that one would "drink the Kool-Aid" and die for the cause.