Well paid expats wearing a hijab, who definitely aren't refugees, will not be treated nicely in Germany. Lived and worked in Germany and saw it a lot. It's a low bar indeed to treat skilled labor coming to your country nicely that sadly Germany can't even pass.
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You are kind of expected to adjust yourself to the culture of the country you’re immigrating to. If you fail (or refuse) to do so in the most obvious/visible ways possible (like clothing), I think you shouldn’t be surprised when people look at you weird because you look out of place.