"Try to value diversity of opinion in politics too.
Zealots are unable to do that - that's what make them zealots."

Couldn't agree more. I have experience - frequently repeated - of Brexiteer Zealots making death threats against me because I disagreed with them. It seldom takes very long before they trot out the usual "You're a traitor who should be arrested, marched out, and shot" horse-shit.

People like them are best ignored.