Sarky B’stard
Legendary Knight
I beg to differ somewhat. Historically we fought invaders the moment they arrived but before modern unitary states it often fell to the local warlord to organise the 'reception party'. Once those new arrivals gained a foothold then they became useful allies against an oppressive overlord. And then we intermarried.....Sadly the pattern we are seeing now is exactly the same pattern that the Roman ingress into Britain, the Angles and Saxons, Danes and Normans all followed. Historically the British people have only woken up to the dangers of people coming into the land from outside when it's too late to do anything about it. The early ones are welcomed or at the very least adopted by one tribe of Britons in order to gain the upper hand against another tribe of Briton's and those incomers send word home for their pals and they come in in larger and larger numbers until, finally, those who welcomed them realise that they are now under the rule of those they allied themselves with and join those who opposed the incomers all along but by then it's too late and the 'regime' has changed.
The DNA record puts the lie to the idea we're even Anglo Saxons when we're 65-70% the original Beaker People who followed the retreating ice sheets. Just like Bosnian Moslems we adopted the language and customs of the ruling class.
The modern post WWII problem is the unique scale and speed of immigration from beyond our own Continent. Combined with bending over backwards to being accommodating we actually encourage immigrants NOT to integrate. There are stark differences between Hindus keeping their religion but being more British than the British and the self directed apartheid of many Moslem communities. The net result is a massive dilution of what it even means to be British.....and that's before you get to Nationalist politics and fictionalised versions of our own history which isn't even very well taught or understood. And then there's the ethnically based criminal underclasses ..... It doesn't make for a homogenous population at ease with itself and its neighbours.