"Feeling unsafe" is an absurd metric to use. Lots of things feel unsafe but are actually extremely safe. Many people feel unsafe flying on airplanes. Though they may not admit it publicly, lots of people feel unsafe around black men. Also, since one can't introspect another person's feelings, the metric of "feeling unsafe" is ripe for abuse. If you don't like someone, simply claim you feel unsafe around them. You can't reliably tell the difference between a liar and a fragile soul.
There is only one thing that generalizes: objective rules and encouraging people to be more understanding. And part of becoming more understanding involves growing a thicker skin. That's the only way that you can have a functioning community that includes communists, libertarians, young earth creationists, Muslims, Mormons, Quakers, atheists, pro-lifers, pro-choicers, Trump supporters, and Bernie supporters. We may not be able to converge on beliefs, but we can get along and work towards common causes. That is, provided that people in the group aren't catastrophizing and looking for any possible reason to be upset at one another.