I could swear that I remember a time when nissan.com had more stuff (ah, here we go: https://web.archive.org/web/19961221205004/http://www.nissan...). He's not a domain squatter; he owns a legitimate business and got nissan.com fair and square. I imagine that at this point he's been driven half-mad by Nissan Motor Company's legal harassment.
I really, really hope that a judge delivers the car company the smackdown it so richly deserves.