I think it would smooth things over if you were more specific about what you meant by "modern values," Franklin. Most Americans probably wouldn't like having their fairly harmless, if somewhat vacuous, celebrity-obsessed culture compared to North Korea's militaristic personality cults. Speaking more generally, I feel a lack of precise terminology is one of the primary causes of the irrationality of political discourse both here and abroad. And looking over Karaite writings, much of their discourse is very precise, with plentiful citations, so learning to be more particular would probably help you fit in with them.
What I would mean by the unhealthy political undertones that correlate too well with atheism would basically be a militant belief in the equality of people. I am an atheist, but I really don't like the leftist obsession with equality. Multiculturalism, ideally, would involve healthy competition between different cultures in which only the most welcome ideas would survive, but in practice it usually means the careful and arbitrary protection of inefficient cultural norms. This even extends to their views on genetics, where people maintain beyond all reason that genetics has NO effect on one's mental fitness. That's not even unscientific, it's just stupid.