I haven't heard anyone say that they are being motivated by fear of covid, and I would be dubious if they did make that claim. I think that people overfocus on white-black relations in the US and we lose sight of what's going on between other communities. Jewish and Asian people have overall been very successful in the US, and more power to them. However, some people may resent that and have poor self-control/reflection. As far as blacks attacking Asians, I doubt you will see immigrants like Jamaicans or Nigerians attacking Asians. Why? They're rather well-educated with higher incomes as well as strong family units, and that doesn't correlate with random street attacks, in my opinion.