How is being 'anti immigration' a racist policy? That makes no sense. By the logic implied in the statement, it assumes that everyone wanting to immigrate into the country is of a different 'race' than is in the majority in said country. Even if that were true, being in favour of an 'anti immigration' stance is not in and of itself a racist philosophy. Wanting to limit or even stop immigration entirely to a country is not inherently racist.
If a political party were to pronounce that they were advocating for an 'anti black immigration' or an 'anti far-eastern immigration' policy then that would be overtly racist. If however, they were advocating for an 'anti [insert religious ideology of your choice] immigration' then that would not be racist. It may be discriminatory but since religious beliefs are not equivalent to physiological racial differences then such a policy cannot – by definition – be racist. Only by redefining the word 'racist' to encompass *any* dissimilarity between any two or more groups can the policy be called 'racist'. To do so would be to bastardise the English language to such an extent as make commonly used words meaningless... and there's the rub.
Debasing the English language is one of the tools of the political left. By redefining words, political traction can be made. The current trend of the political left is to label all those who disagree with them on any matter whatsoever as racists. Or Nazis. Or sexists. Or White Supremacists. Or Nationalists. It really doesn't matter about the specific label. As long as the radical left can pin a label on you, they can claim that you're a [insert non-deserved insult] and are therefore not worthy of debate. You are summarily dismissed as a non-person and ignored. The unstated intention is to shut down debate before it has even begun.
It's been going on for years. And like an untreated malady, it has now become epidemic.