Almost none of the latest uploads to this site are "lore friendly" So I can see why it might have caught you off-guard however there is written text within the website that outlines the rules. I get your viewpoint I do, I've also had content declined and seen others caught off-guard too, None of them took to calling the moderator a clown though, This post seems personally aimed at biggdogg who was merely enforcing the same rules on you as he has for everyone else as per the websites guidelines, So essentially he's being insulted for doing his job.
The new rules have a reasonable explanation behind them I just think these reasons have failed to be communicated efficiently so I get why you're annoyed even if I disagree with the way in which you've gone about expressing this, However they have been communicated, This wasn't a decision made for fun or without informing the community.
Your livery was going to be rejected, It does violate the new terms, I've posted content and like you it was declined, Funnily enough by the same moderator. Your livery is real life, not lore, Ergo they wont accept it here. LSPDFR will though so try there.
In regards to the vehicle itself I do sympathize with you on that one, livery aside, He said on "lore friendly vehicles", Now see thats where the conflict is, Since most of the new vehicles posted and accepted to gta5mods vehicle section are not lore friendly
I'll list some examples:
Renault Megane
Lamborghini Huracan
Skoda Fabia
despicable Me 3 Villain Car
OceanGate Expedition
But to explain this, I believe these rules apply to emergency service vehicles only, Ergo other content that might not be lore friendly is allowed (I'm either right about that, or you're right about bias, My experience tells me I'm right and these rules only apply to emergency vehicles in which case there's no bias, as nobody else has posted any non-lore emergency vehicles on this website for quite some time)
I dont believe bigdog has treated you unfairly or with discrimination.
Putting them on blast and calling them clowns is not the way forward, There are discussions to be had and dialogue between the community and the admins of these sites to be had but that dialogue cant start with insults.
Fun fact for you aswell, while the mods/admins were accepting real-life emergency vehicles it came with a dumpster fire of stress, from arguments on the website to constant claims and disputes over content ownership. I dont know if this affected the decision to change the rules but I would not be surprised. They don't run this website for free, They've had to buy the domain, Build the website and then pay for the mass of storage it uses to allow us to endlessly post to it, I speak from experience the bigger the website is, typically the more it'll cost to run, Unless they're hosting it from home which in itself is an expensive endeavor, so perhaps instead of being entitled we could show a little bit of respect and diplomacy, since they don't have to continue paying the bill, or renewing the domain to keep the site open for all of us as they have been, they're choosing to do that for the community.