I, a Catholic, can even get annoyed with the amount of Hallelujah, Amen stuff on Facebook. You just need to push past it and ignore it. I never understood how people of different religious beliefs (or lack thereof) can hate each other so much. If you cannot tolerate his/her religion, just talk about something else. They try to convert you, say "No thanks." They press on, just walk away. Obviously this doesn't mediate every situation, but its better than arguing or getting annoyed all the time. Just my two cents.
