The idea that English society, culture or anything else is pure is crazy.
'Englishness', whatever that is, is an amalgam of several hundred years or more of assimilation of different cultures, peoples, religions.
What we have now is not the end. It must not and cannot be static. It will carry on changing, for better or worse depending on an individuals viewpoint.

All immigrants will bring something new and we should be glad of that. It doesn't negate what we are, it adds to it and should be welcomed.

k/van