Very confused. Religion is what you truly believe and what you practice through your lifestyle. EVERYONE has a religion. Atheism is a religion. There's even a religion for those who don't care about life or truth at all.
I do not believe they have a name for it but I know thatAtheistare anti religion.
An atheist
A martyr.
If you're asking what you call someone who joins a religion, then you just still call them by their name. But if you're asking how you call someone who's joined a religion, calling them should still mostly be the same. Just dial the number on your phone, they're not going to kill you.
xenophobia
Religion and politics? You might call that person an iconoclast, depending on their objects with the two systems. Myself, I use to different words to describe those aspects of myself: atheist (antitheist) and anarchist.
They can be either Atheists or Agnostics.
Someone who practices Shinto is called a Shintoist or a Shinto adherent.
no
No you need the same game to play against someone
no one knows
We call those people "Hypocritical".