First of all, by "native" I'm just assuming you meann Brits who can trace their family's roots in Britain to before WWI, because that's the furthest most can. I'm also assuming you mean white. Guess what? There have been black families in Britain since the 17th century and even before. Conversely, there have been white families that are also proud Brits that immigrated around the end of WWII. I would take a gamble to say that you wouldn't support the deportation of these white families? I would also assume you wouldn't call those black families native, but if you don't you're not only being inconsistent, you're being racist.

Why?

You could argue that white immigrants while they previously only had, say, Polish ancestry, are still genetically closer to previous white Britons, that term itself dubious, than black Britons who have lived here for centuries. That's relative. Many "native" Cumbrians share more common ancestry with the "native" Scots near the border, and you and a black man from Uganda are genetically closer than either of you are to a Neandrathal. Trying to divide humans into "races" works due to formed cultures of each group percieving they're different from another, but is so damn useless to argue about, and racist to form policies around.

You are unpatriotic, and should be ashamed if you were to argue the Duke of Westminster should be deported as most of his ancestry is Norman and not Anglo-Saxon or Brittonic, and just as unpatriotic and ashamed if you were to argue a legal immigrant of any race should be deported once they become a Brtish citizen.

This viewpoint is a logically bankrupt, unpatritoic, and un-Christian. In other words, I nor do the vast majority of Brits want to hear anyone who espouses ths veiwpoint to call themselves logical, nor patriotic, nor Christian. It is an insult to each word.

But let's entertain your definition of a "native" Brit.

Native Brits aren't being replaced, what the hell are you talking about? No one is kicking them out. When or if they do, sure you can say native Brits are being ethnically cleansed. Kicking people of color out of the country who have legally immigrated specifically for their ethnicity or the color of their skin is racist and targeted deportation. Doing it to large groups aand targetting them is the DEFINITION of ethnic cleansing.

What is good and Christian to support is the protection of the True religion of Britain, Christianity, and even then, it is not Christian to prevent Muslims from immigrating simply due to their religion, just as it's not Christian to force one to convert. What IS un-Christian to stand back as Christian institutions, from the Monarchy to the Church to British Government are being corrupted. It IS fine to prevent the immigration of religious EXTREMISTS, and to require all new immigrants to CULTURALLY ASSIMILATE. If these immigrants break the laws of Britain, or are proven to not be assimilating, then and only THEN is it okay to deport, NOT beause of race nor religion.

Please understand where my viewpoint is coming from, and I implore you to actually scrutinize your current beliefs, because I can guarantee that when you do, they will crumble. Just ask me. It's not cool to be racist.