ISIS sent a message last week: “Message signed in blood to the nation of the cross.” Twenty-one Christians slaughtered on the beach. Did you see it?   They said they were “chopping off the heads of those that have been carrying around the cross illusion in their heads.” That’s me and my family. My church. Their message is for us.   They beheaded 21 Egyptian Christian brothers as an act of Worship to Allah. And the 21 died with prayers on their lips to Jesus. “Lord Jesus Christ,” they called out. “Yeshua!”   And we can feel powerless. Our military might ensnarled in tribal rivalries and ancient disagreements over the…