Aside from telling the Proud Boys to stand back and that "someone needs to do something about Antifa and the left" the thing that stood out to me was him saying "Bad Things Happen in Philadelphia".
Now its not like hes popular in Philadelphia itself (he won just 15.4% of the Philadelphia County vote in 2016), but in my experience Philadelphia is an immensely proud place, that also has a massive chip on its shoulder. My home town suffers from the same issue so I felt right at home right away.
Philadelphia also isn't just Philadelphia county. People from the surrounding counties consider themselves Philadelphians as much as those living in Philly proper. At least thats my impression.
It strikes me as foolish at best to insult any voters, even in a city that didn't vote for you in the past.
Now I don't think hes going to lose voters over something as small as this, but he won PA by just 44k votes. I wonder could this inspire some otherwise uninterested voters to vote in spite? Using the most recent voter registration numbers Philadelphia county makes up 12.4% of the total for the state and comparing totla votes to the 2020 registration numbers only 64.3% of Philadelphia registered voters actually voted, compared to 69.2% at state level.
Just getting Philly up to the state wide turnout level is an additional 53k voters.
And thats before you consider whether he has any impact on the surrounding counties like Montgomery, Bucks, Delaware etc.