I was a 4 x 4 owner, and a cyclist, and now I'm not, and I'm still a cyclist. So far as I'm aware, whether I drive a 4 x 4, or a two wheel drive car, does not really affect me as a cyclist, or a person.
On the first point though, I would say mounting four bikes on roof mounted bars on a Range Rover was bloody hard work. Next time I buy a 4 x 4 I'll get a rear mounted rack!
Oh, and for the record, I would say judging anybody based on what car they drive is pretty damned stupid. Even if you think they could find a more cost effective solution to their transport needs, surely that applies to pretty much every one of us in terms of our bike choices!
Oh, and ps. Also stating the ability of 4 x 4's off road ability based on what you've heard, or read is pretty silly too. I've been on a proper off road course and seen what Land Rovers (RRS, RR Vogue, and Defender), can do, and I guarantee no saloon, or Yet, or Panda would do the same. It's not just down to whether you have 2 or 4 driven wheels, it's the electronics, the amount of clearance, the wheel travel, and a hundred other things which you haven't thought about, as well as wheel and tyre choice, or course, which as cyclists we should all know will make or break the traction efficiency of any wheeled vehicle!