He can't be putting a bunch of emphasis on social issues like "Trump is a racist" or even "equal pay for equal work" in an R district. He has to win on a working class economic message and I can see that if he pushes things like that more he could turn off many people that disagree with him on that but would have supported him otherwise. He's a long shot to begin with, but, this is a huge step down from his first video.
As long as it's only one or two ads well before even the primary, this shouldn't be a big deal