I don't think you understand what racism means or at least you are confusing/blurring race and nationality which are 2 very different things
Dictionary definition of racism
It's based on race not nationality. So having a dislike for your nations culture being eroded away by culture brought by waves of immigrants from other nations is in no way racist. It maybe culturalist (if there is even such a word/thing) but it is not racist.the belief that all members of each race possess characteristics, abilities, or qualities specific to that race, especially so as to distinguish it as inferior or superior to another race or races
Of course the nanny state loving peons like to label any dissent based on immigration as racism due to the fact everyone is so terrified of being labelled racist they know it shuts up the dissent toward immigration policies that are present in many people.