Transcendent, Integrationist, Colorblind... I guess? But that doesn't mean cultures aren't important or that there shouldn't be some level of tolerance to them as long as they don't violate human rights.
Basically this. I'd add, however, that the popular notion that "all cultures are equal", more or less, is inane and frankly, insulting because:
a) culture is neither innate nor unchanging
b) no culture is monolithic
c) culture is an incredibly complex and at the same time, very sensitive topic - this combination means that we should be very, very careful here
d) saying that all cultures are ultimately the same is reductionist in the extreme
e) me saying, for example, that my (white, suburban, middle-class, American) culture is ultimately the same as that of any given person living in Paris or Berlin, Moscow or Kiev, Cairo or Tripoli, Tokyo or Seoul, etc. is not only untrue beyond the fact that we are all human beings (true!), but is also - ironic in the context of this particular debate - deeply
insensitive to cultural differences and variations. Kinda like how saying that all religions are the same is insensitive to each religion's particular history, traditions, theology, and yes, culture(s).