A "suicide attack" is when someone deliberately and intentionally causes harm or kills themselves while trying to harm or kill other people. Full definition
This is not to say that if religion disappeared so would war, but I imagine their would be fewer suicide attacks if religion no longer existed. (religion.blogs.cnn.com)
If your claim were true, then suicide attacks would be ok because they are only taking such action because of their faith. (religion.blogs.cnn.com)
From 2001 to 2010, global suicide attacks increased by more than 300 per cent. (newscientist.com)