http://news.yahoo.com/s/afp/20101017...ionimmigration

Then this today from the German Chancellor.

Learn the language? Good COIN, keeps people from falling into enclaves that feel excluded due to their inability to communicate with society as a whole, and are thus more likely to perceive dangerous discrimination.

Learn the culture? Also good COIN. The more homogeneous a society the more stable.

Abandon your religion and and become Christian? I think this is too much. We attribute too much to ideology that is really much more related to the other two factors above. IMO if you do one and two, three is unnecessary for the stability of a society.