Anything that fosters understanding between conflicting groups in our world is helping to create a more harmonious and better place for us to live.
This includes understanding between Christianity and Islam, right and left, gay and straight etc..
Getting to the root of the problem is the key.
And there you will find fear.
Violence and anger are most common where we find the most fear.
Fear makes us use force and coercion.
Often this fear comes from the pulpit.
You will find that the most violent religious people are those whose leaders preach fear from the pulpit.
Terrorists are people who are terrified (usually of God).
So anything that we can do to reduce the level of fear in our society will help to curb violence and hatred.
Faith, understanding, and love.
These three reduce fear.
And these come from God.