It's awesome that that's been your experience! I genuinely hope that continues.
It unfortunately is not the only experience, and the evidence I've seen points towards it being far from the norm. It's possible those foreigners you're meeting frequently are just jerks, and that that is contributing to it, but the possibility also exists that they might have that chip on their shoulder because their concerns are genuine.
The documentary iandanforth mentions is a good example of the stuff I'm talking about. You don't need to take my word for it - you can see the genuine experiences of others living in Japan.
It unfortunately is not the only experience, and the evidence I've seen points towards it being far from the norm. It's possible those foreigners you're meeting frequently are just jerks, and that that is contributing to it, but the possibility also exists that they might have that chip on their shoulder because their concerns are genuine.
The documentary iandanforth mentions is a good example of the stuff I'm talking about. You don't need to take my word for it - you can see the genuine experiences of others living in Japan.