Why I am not a vegan

[Jade]

I consider something 'disrespectful and rude' if it's directed at someone personally. It's not disrespectful or rude to express one's own opinions about ideas and concepts.

So you find it disrespectful and rude to say something to one specific person, but you find the same thing not disrespectful or rude to say to the "all", under the guise of your "opinion"? What is the difference?

When you refer to omnivores vs vegans you are talking about groups of people, not merely concepts and ideas. Therefore those who may hear your words who fall under that group of people may find what you're saying personally offensive.