I'm 53, playing since 8 years old. My drumming has included every style you can think of, including jazz. In an ideal world, jazz would be my preferred genre. I've done big-band gigs, combo gigs and duo gigs with a pianist. I've also done tons of rock, top 40, weddings, etc.
I've only been here for a couple of months, but must say I haven't noticed any negative vibe towards jazz players. In fact, I've participated in threads where jazz players were discussed as favorite drummers, bassists, etc. I've seen plenty of jazz players mentioned in positive light. You seem kinda angry about it, but, its like anything else. Take it for what it is. Its a public forum. People will say what they will, and you're not going to agree with everything or how its stated.
Its supposed to be a fun thing. I'm enjoying it. If you don't have a good time here, well, you know what to do...