Can I sue an atheist group for attempting to oppress acts of religous expressions?
No, not unless they’re doing something to you which is otherwise illegal, or would otherwise make them subject to a lawsuit. If someone, or a group, says things that you don’t like about your religion, ridicules it, or tries to persuade people not to participate in your religion, they’re exercising their rights of free speech and freedom of religion; it doesn’t matter if they’re atheists or simply members of a different religion.
