The whole idea behind it was radical unity, internationalism, and bringing disparate people together on equal footing. Instead of me speaking a language I've known since birth, and you speaking a language you are just capable of understanding, and both of us trying to plead our case to the government, the idea is that we would all have an auxiliary language to compliment (not replace) our mother tongues, and we would both be capable of making yourself understood equally.

Those ideals don't really jive with hard nationalism and pseudoscientific ideas around superior races