I was once taught about a series of Holy Wars that occurred. I thought it was terrible that there were such a long series of wars.
I later learnt that a Holy War meant that the war was declared and fought over religion which did not seem like something that should be fought over to me.
Later still, I found out these religions were both of the same origin with many of the same teachings. In fact the same God.
One of the religions had a messenger of peace offering salvation at least.
Finally, I found that actually both the religions had the same peacemaker as well as the same God. So two religions with the same God and the same message of peace went to war.
Blessed are the peacemakers wherever they may be.