I like everything you said. I also think the black vote will be ho-hum for Biden, if that. Are union households going to support Biden and his plans that would hurt PA? I see union workers supporting Trump in larger numbers than Hillary.
The polls are designed to depress Trump support and it only strengthens it.
1) The riots will not stop if Biden is elected because he is a racist.
2) Many Blacks will not turn out for Biden or the faux Black Harris. They won't vote for Trump but they won't vote for Biden either. Were it any other demographic I would say they will show up to vote down the ticket, but I think in this case many will just not show up.