When dealing with whinging immigrants most of us have probably used a derivative of 'well if you don't like it here just fuck off back to where you came from'. But based on the principle that if you're explaining you're losing maybe posing this recommendation in question form might be better.
Like: 'Why are you here in a White country?' 'If White countries are so bad for you why didn't you go to a non-White one?' 'Can we assume by your choosing to live among Whites ahead of your own you see Whites as more desirable co-citizens? If so aren't we justified in not wanting these less desirable people coming to our countries?' 'If your own people and culture are so good can we assume you'll be heading back at the first opportunity? If not, why not? If it's the case that you actually prefer to live in a White country can we expect that from now on you'll STFU and just be glad we left you in?' This structure can of course also be used when arguing with libtards about whingeing immigrants, replacing second person singular with third person plural. Remember, if you're explaining you're losing.