99% of crimes like this are motivated by revenge. A person gets
fired, there's a divorce, payback for a crime, etc., and they go after
that person. Someone is fleeced by a lawyer, and he shoots up the law
office.
The last five years are just too random, and the only constant is a
psychiatrist prescribing psychotropic drugs. The latest round of
massacres hasn't shocked anyone's senses, so it's logical that Zionists
will engineer some horrific gun massacre in the future, in order to
scare the masses into wanting strict gun control.