But if it's just your interpretation of whether or not one is intolerant then yes, you must tolerate him, because if you don't your tolerance has no meaning. So of course one shouldn't tolerate Hitler, Stalin, or other clearly hateful people-but others, you are not do black and white should be tolerated (according to the shitah of those folk that preach tolerance).
Sone things are black and white but most are not.
Extremists are basically intolerant of women. They view women in a way that Halacha never asked them to. Removing women's faces from magazines, refusing to sit next to a woman on an airplane, and imposing new modesty restrictions almost every other day; no more talking in the streets, no more walking on the same side of the road, no longer allowed to have a smartphone, not allowed to wear this or that kind of sheitel, this or that brand of clothing etc.
But worst of all, imposing on OTHERS to act the same. Spraypainting billboards, covering up cereal boxes, calling Nestle and harass them to remove a picture of a woman. This is intolerance.