We talk about God as though he was like a somebody. We ask him to bless our nation, or save our Queen, or give us a fine day for the picnic. And we actually expect him to be on our side in an election or war even though our opponents are also God's children.
Ever since the Crusades, when Christians from western Europe were fighting holy wars against Muslims in the near east, western people have often perceived Islam as a violent and intolerant faith - even though when this prejudice took root Islam had a better record of tolerance than Christianity.
It is people who are violent, rather than "religions"; and since we secularised our politics we have had two major world wars, the Holocaust, the Soviet Gulag, and the atomic attacks on Hiroshima and Nagasaki - none of which were inspired by religion. If we want to understand the dangers of our world, we can no longer accept the old received ideas.