Only asking because I'm morbidly curious, but....This is where the "well you called me a nazi so much I just BECAME one" fallacy enters the equation. If it comes down to you believing that its okay to kill non-whites to maintain a demographic majority in your country, yeah. You're a white supremacist.
I do not think it is ok to kill non-whites to maintain a demographic majority. In fact, I think that race-mixing is probably the preferable way to avoid genetic impurities and build a healthy society ( free of racial strife ). However, since I also think that immigration should be confined to legal methods and that abortion is fundamentally murder (and also Planned Parenthood is a soft eugenics program against black Americans) that is enough to have me be called a nazi plenty of times.
So am I a Nazi/White Supremacist or not? I don't follow any of the tenets associated with Hitler or National Socialism, but I refuse to perform rhetorical acrobatics to dodge a slur thrown by people who don't even know what it means.