I'm not aware of him suggesting people harass anybody. There's a wide line between saying crazy things and calling people to take specific action against specific people.

he repeatedly asked his audience to "investigate" the families and a number of them did so in person.

My dude. He was ranting for years to an audience of people self-selecting as susceptible to propaganda about how a specific group of normal ass people was assisting the Government in dismantling their second amendment rights.

Like no he didn't literally say "go torment them" but come the fuck on. The connection between the events here isn't 1/10th as complicated as most of Alex's actual theories, it's literally just a line.