Unifying everyone is not handled by just one side. They meet each other in the middle. Regardless of how far in one side goes to the middle, if the other side keeps distancing themselves, then there can be no unifying. This is why those hecklers were shut down by Harris. They came to a rally to be hecklers because they are against such unification and diversity. No matter how much Harris could try, it can't be done with "that" group until they change.
As much as you talk about Harris rejecting an entire group, that's pales in comparison to rejecting basically half the country because they are women.