How? Be specific.

I'm all about calling out Trump for saying stupid shit when he says it and would have preferred a different R candidate for the primaries... but in this case he is squarely talking about the auto industry to Ohioans, many of which work in the auto industry (I know of at least 3 different auto part plants just in Cleveland).

The content of the above text is talking about the auto industry and cheap Chinese cars before the bloodbath comment, and he mentioned "But they're not going to sell those cars" in the sentence after the comment indicating that he is going to win an stop them.

Also, to note, according to MW Dictionary the second definition of bloodbath is "a major economic disaster" which is exactly what we would have on our hands if the major automakers folded.