stop all non white immigration
This.
Yes western cultures intermingling with foreign cultures will inevitably cause the decay of western civilization, particularly the United States. Although immigration is drastically affecting Europe as well.
But anyone that says the truth is simply discarded for being "racist".
Europe? Unless parties like Golden Dawn, Jobbik, and NF(or everyday people) do something, they're already done!
Yes, what you say is true I suppose. I do not live in Europe so I am not as familiar with it. I think the damage is done, any resistance to foreign immigration is labeled racist, evil nazism, and whatever other labels liberals conjure up.