Answer:
Your belief system is the invisible force behind your behavior. Together with other factors such as your personality, your genetic set up and your habits, your belief system is one of the strongest forces that affects any decision that you are making.
Right now, I would call them "diaspora" if they're more dispersed (Armenian diaspora is quite well-known) or a "community", for example "French community" if they're more closely in contact.
If they reject their new land's law and intend to include this land into their old one, they could be "colonizers".
Anti-slavery rallies and abolitionistic movements
I think A but I don’t know if I’m right