Open Question: Should I lie when turning down a girl?

I only like White girls because I find them attractive. I am also White. It's just that at school, there have been a lot of Asian and some Hispanic girls asking me out. Yes I do decline them because of their race. I also hate it how the Asian girls think they can charm any White guy, they even go as far as ignoring other Asians. It's not wrong to want to preserve my culture or go with my taste. So should I just tell them I am turning them down because of race and culture differences?