He says that fear is a bigger motivator than love.

He’s correct in a sense you may not notice.

Those voters fear Harris and what she represents, and love some idea of what GOP could in theory represent.

So the fact that Trump is shit means less for them as it’s on the side they love, while Harris being stronger makes them even more afraid.

That is, the best strategy for Dems to insure victory would be to successfully present Trump as having a potential to win to his own voters. Then they would care about him being a felon and such.