They are meat eaters - but I've also seen them climbing onto bird feeders meant for smaller birds and trying to get the seeds. I'm only assuming that they're the ones poking holes in the ripe tomatoes, I could be wrong.
I just love my rascally Blue Jays. And you are right, they are not the Scrub Jays that you have. I have a hole in one of the posts on my deck. Sometimes I put a couple of peanuts in it just so I can see them turn their heads to eyeball down into the hole. LOL