The application of the statement “religion causes wars” to Christianity is actually a double lie.
It’s a lie because its detractors classify Christianity as a “religion” just the same as any other. You be the judge of whether or not that’s fair. But let’s give them that one for the sake of argument.
It’s also a lie because it’s not even accurate to say that the disparate group of things secular people call “religion” causes wars. It’s not just intuitively wrong, it’s statistically absurd.