Jennifer Lopez is ripping Donald Trump for what she says was a divisive rally in New York ...

but will her emotional rebuke make a difference in the election? We dove into J Lo's passionate speech from a Kamala Harris event during a segment on "TMZ Live" ...

and examined what it means, or doesn't, in terms of votes. Some in the office think it's unfair for J Lo to go after Trump for a racist joke a comedian made at his Madison Square Garden rally ..

. because DT wasn't the one who said it. One thing we can all agree on .

.. the Trump campaign screwed up by inviting Tony Hinchcliffe to have a speaking role so close to Election Day.

.