We are all products of our culture and our time. Escaping the conventions and traditions of the culture into which we were born is difficult, and seeing which traditions and conventions need to be changed or escaped in the first place is difficult as well. I fully understand how hard it is to face these things.
But if you consider eating meat produced by the present-day regime of factory farming to be completely without moral complication, if you think that raising animals in order to torture them to death over months is perfectly unobjectionable, I can't consider you anything but a moral imbecile.
I'm not a vegan, and there may be arguments for the necessity of meat that mitigate culpability for the horror human beings inflict on the innocent, but if you don't recognise eating factory farmed animals as at least in some respect a significant moral failing, you are in complete denial or inexcusably ignorant or a psychopath.
If you make fun of veganism or the suffering that we put animals through, you're an ass-hole. Sometimes vegans can be annoying, sometimes they can be pedantic, but if you eat meat, people who do not eat meat are morally superior to you. Accept that, suck it up, learn to live with it. It's a fact and you know it.
Merry Christmas.