If you look at his site, when it was a computer shop, fine. Then he started running ads (really trying to profit off nissan motor's brand) related to cars. Then he got taken to court. He played off like a victim forever.
Did he have a legitimate reason to buy the domain originally? Absolutely.
Did he infringe on Nissan's trademark? Almost surely, which is why he was forced to stop.
No real good guy in this story.
What's my background on this? I helped build the most comprehensive database for domain name legal cases (https://udrp.tools) and tend to be involved in areas regarding domain name registrant rights. IP lobby is already way too strong, picking something like Nissan.com as the rallying call really isn't the right move. There is going to be some balance.
If you want egregious, lookup france.com
https://www.reuters.com/legal/government/supreme-court-wont-...
The french government intervened in a case and took france.com from the owner claiming sole right to using 'France'
That is bullshit. ICANN is also trying to take away domain name holder's rights to even go to court at all, in case it's an IGO (https://freespeech.com/2022/05/18/icann-igo-working-group-ch...). IGO thinks your domain infringes on your rights? You have zero recourse, and they want to grant immunity from the legal system.
There are some real fucking injustices happening in the domain world that nobody is paying attention too. Nissan.com isn't one of them.