The increasingly loopy Tucker Carlson doesn’t come out and say what he is getting at, but it’s clear enough anyway. And now he knows, or claims to know, who is really responsible for the worldwide Islamic jihad against America and its allies. America had no Islamist terrorism problem before 1948. America fought its first war against Islamic jihadis, who made their Islamic motivations abundantly clear. Tucker Carlson, however, is not interested in such explanations.