Cain killed his brother Abel.
Muslim invasions have killed tens of millions of Orthodox Christians over the past 1,400 years and have tried to destroy Christianity in the East. Some brothers! But you can't expect someone from the West to know or understand any of that.
“Muslim invasions have killed tens of millions of Orthodox Christians over the past 1,400 years and have tried to destroy Christianity in the East. “
Not sure that holds a candle to catholic/protestant carnage.