Ask why people are upset.
Listen to their answers.
If their answers don’t make sense, try to help them clarify.
Imagine the world from their point of view.
Then try to understand how that person sees you.
Ask again if you still don’t understand.
Repeat until you do.
Then.
If you disagree, find the smallest things on which you can agree.
If you can’t find that tiny seed, then search for the common elements of humanity you share.
That’s a place where all of us can start.
Let it grow from there.