This is definitely the place and thanks for sharing your experience. As a white immigrant in Germany I have witnessed many racist encounters, and that's a big part of what motivates me to be much more vocally anti-racist.
To answer your question, no these "anti-authoritarian warriors" generally do not realize they're being racist, but they also don't care. Although if you called them out on being racist they'd probably have a tantrum about how offensive it is that you called them a racist.
That preconception that non-Europeans are unfamiliar with "democracy" and "free society" extends far further than just these outgoing train station solicitors too. For example, if you chose to permanently immigrate here you'd have to take an "integration course," which condescendingly teaches you western values and the supposed principles of liberal democracy.