"I find people who don't think exactly like me to be intolerable" is the bread and butter for controlling a population. People look at the past and think to themselves "those people in the past were wrong, that's why the one acceptable way to think being enforced with power was immoral, on the other hand, my opinions are right, so the ends justify the means".
Intolerance is intolerance, regardless of how morally justified you think it is.
Intolerance is intolerance, regardless of how morally justified you think it is.