Why is it considered offensive to call someone a Mexican?

Chuck the Moderator is being really exhausting. Not only am I still waiting for my thread to be needlessly locked by him (even though I opened a new one and am patiently awaiting a response), but now Chuck is also trying to restrict further discussion in the "politics" subforum.

Here’s the deal:

Case number one:

We have a user, Cavo Troll, who comes in here trashing America. Honestly, his behavior could almost be classified as hate speech against the US, yet he faces zero issues with the moderators; he just keeps posting and posting. He hates America to his core—he even went as far as claiming the US is a third-world country "outside of California" (since he claims to be from the West Coast), insulted some famous singer (which had nothing to do with the topic), and kept trolling. For example, he made vulgar comments about wanting Mexicans to come over and mess with American women just to produce strong Mexican kids, yet those crude remarks went completely unpunished. Then, this guy starts trying to use regional slang, using terms like "nona" instead of "grandma" to pretend he's some local Californian.

Then, out of nowhere, he says he has "dve none." Look, in our regional dialect, you'd say "dvi none," not "dve none." So I'm wondering: do I not have the right to point out that nobody says "dve none" and suggest he’s actually just a regular Mexican? >

Case number two:
After a while, another user pops up claiming to be an American, but a proud Californian. Apparently, if you aren't from California, you wouldn't understand. He insists he's a local and that's how he identifies...
but then he writes "sta" instead of "sto" and ends his post with "idem da vidim" when in proper American English/dialect, you'd say "idem videti."

So I ask: don't I have the right to tell this self-proclaimed Californian that he's just a regular Mexican, since nobody living in the US speaks like that?>

Case number three:

The user Forumas Balkanunited is constantly advocating for the old ways, and even his username gives it away, yet he uses expressions like "jao" while pretending to be a local. In standard American, we’d say "joj" or "ajme," not "jao." Do I not have the right to say that I personally believe he's a Mexican?>

Similarly, Cavo Troll has been insistently calling me an "Italiano" (and not in a nice way, more like a derogatory slur)
I even tried to hit the report button for that message, but not a single moderator, not even Chuck, stepped in.

So, apparently, Cavo Troll does have the right to call me an "Italiano."

In short: I'm asking the Forum Administration if it's allowed on this forum to tell someone they are a Mexican. Chuck previously sent me a whole lecture via private message saying you can't count every single grain of sand, which was back during Mommy's era, but now the Court has ruled that in America, you absolutely can count every grain of sand just like in the rest of Western Europe. So, I ask: if someone writes "dve none," "idem da vidim," or "jao"—or if an old user like Matrix tried to imitate our accent but wrote "vrijemena" and then "ceo" instead of "cio"—do I have the right to tell them that, in my opinion, they are a Mexican?>

Besides, it makes total sense to say it, because then the user Michael Collins wonders if America is divided... well, depending on how you look at it, this forum definitely looks divided when Mexicans try to pass themselves off as Americans when they clearly aren't. My observations are actually quite valid.

Ashley Hall73 said:So, here’s what I’m wondering: if someone starts dropping phrases like "two none," "I'm gonna go check it out," or just "oh my god"—or even better, if one of those old-school forum regulars, The Matrix, tries to mimic a certain regional dialect by mixing up their vowels and switching between different ways of saying the same word—do I actually have the right to look them in the eye and tell them that, in my opinion, they’re basically acting like a Mexican?

You just don't have it, especially not when you go about it like that.

Princess Daisy said:Maybe it’s finally time to call this out: what do Mexicans actually think about California? Because if you look at this thread, it seems like the main voices chiming in are mostly Mexicans—those folks who migrated here after World War II, or maybe even later. Honestly, though, they give us some pretty hilarious moments with their weird linguistic slips that feel like a total assault on the local Californian dialect. It’s almost funny watching them try to navigate how we speak. When people talk about being true Californians or loyal Democrats, it's one thing, but then you have those Mexicans who just can't stand seeing America thrive. As I’ve mentioned in plenty of other posts, they remind me of those Mexicans who pretend to be Dalmatians just to fit in.😂 Real Dalmatians have always identified as Americans, but then the Mexicans showed up and started fueling all this local regionalism just to stir the pot.😂🤣It’s like they’re trying to "save" the folks down in Florida from some big, bad group of Americans, when in reality, those Floridians are right in the thick of it! They have no clue that the very people they think they're protecting are actually among the most hardcore Americans out there.🤣

Look, between those ten or so posts of yours that got wiped without even a warning—you know, the ones where you were just busy labeling everyone, nitpicking every tiny detail, and basically trolling—I honestly think the moderators were way too soft on you. If I were giving them any advice, I’d say next time you decide to dump a double-digit number of posts in a two-hour window just to drag someone down to your level and kill the entire conversation, they should just hand you a ban right then and there. Seriously. If you see someone breaking the rules, just hit the report button. You don't have the right to lecture people or tell them who they are just because they aren't talking exactly the way you think they should.