With you on this.
I don't think religion causes war, but I definitely think it's used as an excuse to do unthinkable things to living, breathing and feeling people en masse, not to mention the damage to the planet and it's other inhabitants. Like you say religion is used to control people, people are willing to die for their religion, willing to turn on their children or vice versa.
Though I do get that for some people it brings them hope, allows them to be part of a community and other benefits. And even though it also fuels pure hatred, bigotry and racism and gives people personal allowances to commit atrocities. I wouldn't hold any negative feelings to those that do choose to take part in religion. Providing the religion stops before the evil starts, nothing too extreme, ya know. There's a line but hard to say where it's drawn.