Hmm, I'd push back on that just a little.
I mean, you're right; almost all people are nice and friendly one on one. But when it comes to things like racism or antisemitism or homophobia, the exceptions to that rule, can be genuinely dangerous.
Nice, friendly people can still hold evil, bigoted beliefs. But you don't change those beliefs by demonising and attacking people. In fact, you just deepen them