Would the kkk (or other white supremacist groups in the U.S) accept racist Spaniards to join their group?

Various white racial groups of significance have had or do accept white hispanics (hispanic being a cultural title, not a genetic one). A few are extreme Nordicists that exclude Mediterreanians and Slavs, but most are not the "Germanic fanatics" from 30 years ago. They don't necessarily suffer the same misinformed colloquialisms the average uninitiated white American racist does, afterall, race is a subject that interests them tremendously, so they take care to understand it. Miguel Serrano is a notorious white Chilean neo-Nazi with contacts with American neo-Nazis. Spain, as well as some South American countries with significant white populations have similar organizations, and racist skinheads as well.