Is it so hard to let it go?

These days there is so much anger and hate going around. It's literally spreading like a virus. How easy would it be to just spread love around the world? It's so easy to do and yet very few people do it!
When someone makes me angry or upset I have found that it's so much easier to just let it go.. Sure I'm still angry, but that anger does nothing for me. All it does is it makes me feel upset and I hate feeling like that. I can't think of anyone who enjoys living with those negative emotions.

In order for peace to truly come, one needs to put aside their anger and just let it go. Is it so hard to just let go of the anger you're feeling?