Your entire argument is based on the assumption that your morals are the "correct morals" while everyone else who doesn't align with you is incorrect. That's a textbook definition of this fallacy.

No, "begging the question" refers to circular logic. What you're stating is actually called a belief in moral realism, which is a different subject altogether. How are you going to throw out an accusation of a fallacy so damn smugly and then proceed to say that I engaged in a textbook example of the fallacy when you clearly struggle to even know what said fallacy means?

Furthermore, if you're appealing to moral relativism, you could easily reductio this to some absurd conclusions, like saying "My personal morals justify SA, so stop thinking you're superior for opposing SA!"

That's exactly what it is. Disagree? Explain in detail; don't just say it like it's obvious and a "no shit" kind of take.

That's not what veganism is. Veganism is a deontic stance against animal exploitation, and this is common knowledge for many people, even if not for an overwhelming majority of carnists. Not going to zoos, not wearing leather, boycotting the pet industry, and abstaining from riding horses have nothing to do with diet, but they are still aspects of a vegan lifestyle. Acknowledging these things, however, would come with a more explicitly ethical consideration, so you avoid such an acknowledgement because you're unable to narrow these things down to this trivial dietary choice you're framing veganism as.

Where has that happened here? I challenge you to quote the comment stating as much. Seems like you're strawmanning here.

None of your comments discuss veganism in the context of it being a philosophy and a principle, but every single one of your comments have tried to drive home this ad hominem.

Examples:

And here's that exact superiority complex on display for all to see.

What thoughtful discussion arises from someone repeatedly telling you that they're morally superior to you for choosing one specific diet over another?

I have no issues with someone being vegan, but I take issue with self-righteous people such as yourself who can't help but talk about how superior their choices are.

"Veganism isn't about me, but if you criticize me personally, you're criticizing veganism!"

What is nuance? You are criticizing vegans for advocating for the victims of their movement, which is a criticism of veganism in and of itself, even if you do not realize this and do the pseudo-respectful, "I don't mind you being vegan as long as you don't push your lifestyle onto other people!" You clearly don't agree with veganism ethically because you support animal exploitation and slaughter, so my point is that, instead of actually trying to argue a case for why veganism is ethically incorrect, instead, you decided to just adhere to the classic ad hominem tactic that carnists abuse the shit out of all the time. Also, you have a very one-dimensional, myopic way of thinking. Even in cases where a justice movement isn't about the supporters of a movement itself, insulting the supporters of that movement still comes with the negative connotation of undermining the validity of the movement. For instance, if you insulted a male feminist, a cishet ally of the LGBTQ+ community, and a white advocate for racial justice for being "pushy" about their beliefs, you are giving away an indication that you disagree with the advocacy of their respective movements on some level.

This is hilariously illogical. It reads like someone whose brain is short circuiting from all the cognitive dissonance.

This is hilariously ironic. It's starting to read like parody even!