I can see that you are just focused on racist talking points about immigration and any discussion here will be very unproductive and just a wast of our bandwidth.
Every racist that has ever existed also drank water. So what?
To me it sounds like you are insinuating that wanting to preseve your culture is racist - I don't see any other point to your comment. Correct me if I'm wrong.
No, however WHY you want to preserve your culture and HOW you intend to do it is what determines if it's racist.
A lot of people want to preserve their culture because they view it as superior. Historically, they view other cultures as lower-level, that of savages. They think themselves civilized. This is, obviously, racism.
And in regards to the how, what is the methodology? Do we perhaps build camps to put people of a certain brown complexion in? Do we round them up in the streets? How do you even tell who is who - by their skin tone? As you can see, there's a lot of potential for racism there.
People want to preserve their culture for the same reasons, because it is their culture, it is their identity. How? Simple. Stop bringing in people that do not share your culture inside your country in large numbers.
Historically, they thought other cultures to be not as civilized/savages because often those cultures were not as developed, or as civilized, and often contained human sacrifice rituals. Regardless, forcing their culture on them was wrong just like it is now.
The first step is stop mass immigration. Then revoke all non-highly-skilled labour visas etc. Then add a $50k/yr additional tax to all work related visas, paid by the employee.
Also, not talking about US since they made their bed by bringing in through slavery, but talking about majority of Europe.
It feels like you are so scared of being seen as racist that you will sacrifice your culture just so you don't get called a racist.