When you tolerate the intolerant what generally happens is you drive those who they target to need to leave to find other places of safety. Hosting intolerance means they are given new avenues to harass, select targets and make people miserable or afraid.

A lot of people have this idea that intolerant people are just people who want in their heart of hearts to be good and should be given that opportunity if you can only wheedle them into realizing what they are doing is bad. But when you try to include them in a mixed space all that serves to do is impress upon those persecuted that the intolerant person is the one who will be catered and adapted to their wellbeing is favored over that of their victims who are made to feel selfish or needy for just not wanting to be picked on. Apologists for intolerance give them secondary access to their victims

Even though it comes from a good place it is not ethical to host the intolerant in the same space as their victims and you can absolutely become a jerk for trying too hard to reform someone at the cost of sanity of everybody else in the room. The social contract isn't a straight forward thing. There's some gray area where you have contested coverage.