There is a well-known tale about vampires. They cannot enter your home unless you invite them in.
I love the idea of this as a metaphor. It applies to so many things in real life.
In a work environment, you don’t end up with dysfunctional people who will destroy your professional team from within unless you agree to hire them. If you are the person responsible for that team, and you let in one of those people, then the bad things that happen to productivity and morale are your fault.
Similarly, the citizens in a democracy are free to elect a weirdly incompetent self-absorbed fascist who promotes racism. But if those citizens do invite in the vampire, they shouldn’t expect it to end well.
Just saying.