Events like those yesterday in Washington D.C. affect many of us, but we can do little about them. Angrily shouting down other people on social media affects you negatively and doesn’t help in any way.
One way to cope is to sit down, close your eyes and think of the people involved. Send them all your hopes for a peaceful resolution. If you are religious, you can pray to your god. Sending good thoughts will help you and might improve the world.