Culture is a composite of all member of a society. So, what culture are you referring to? A past one or a current one?
No doubt pagans were defending their cultures when Christianity came along and displaced them.
When Rome came into barbarian Europe, this was a high culture displacing a lesser culture. There was net advance for the lower cultures, with the higher culture in charge and showing new ways. Modern Immigration is lower cultures coming to a higher cultures, now without being invited. People do not run away from a higher culture to live in a lower culture. The USA had invited 1 million people each year based on their ability to assimilate. Illegal immigrants are uninvited guests, who will get stuck in a bind and form pockets of second and third world for a local water down grade of citizens. What is the Left Thinking?
How about I force you to accept a half dozen homeless into your home, or I will call you a xenophobe if you refuse? You will go from a stable home, to who knows what, unless you spend lots of time and resources trying to maintain the higher road against the down slope inertia. It is easier to do drugs and steal from the host or Big Brother.
What should happen is only those who want immigration; high on the horse, have to provide 100% of the resources. If you want immigration raise you hand and we will dock your pay. Now the boneheads and crooks in charge steal from everyone, to satisfy a desire of a few. You should have the option, to option out.
Biden forced over a $1/2 Trillion extra expenses on US citizens; strain on schools and logistics. Not everyone wanted this. I would force Democrats too pay the entire tab since, this the was their bone head idea. Maybe what Trump can do when elected is send all the illegals in Republican states to Democrat run states, so the Democrats have to put their money where their mouth was. The Democrats party will implode under the expenses of their boneheads ideas. This may be useful.
The Democrats had sanctuary cites; we care so much, who, after getting a few immigrants, now complain about too many immigrants. They were fine when this was impose only on Conservative border states like Texas and Arizona. They can pretend to care as long as they were buffered. Now the party is divided. The above idea can break the DNC.
Poland is right to opt out, unless the boneheads in charge agree to pay the full tab. If not, the bonehead leasers should be forced to take the immigrants they welcomes, into their own mansions, since they talked the talked and can afford it. Democracy is about choice and not the current fascist edicts.