As a vegan can I give you my perspective on this. For the record I have never ever lectured my family on animal farming, cruelty etc. But I can totally see why others do.
The thing is, when you become vegan, the only way I can describe it is like you’ve left a cult, and all your family and friends are still in the cult (it’s just an analogy). You have realised how awful farming is, seen how the animals suffer, etc etc (not going to lecture here either!) and you want everyone to know! You didn’t know, and now you do, and it’s suddenly shocking and appalling that people don’t know! Why doesn’t everyone know this?! Everything would be different, if these good people, kind people that you love, knew and cared in the same way you do.
And it’s incredibly hard for some people to accept that you can’t influence people, and that some people who will always be good kind people that you love will never know or care like you do.
But you have to remember that you were them once too and nothing would have changed your mind either. 10 years ago I’d have laughed at the idea of being vegan, I loved cheese!! No amount of vegan ranting would have changed that.
Personally I accepted pretty much straight away that I’ll never convince anyone to see animal welfare/ farming / veganism the way I do so I won’t try as it’s just upsetting for everyone. That’s why it feels culty, as soon as you speak out about it you’re looked at as a troublemaker.
Don’t get me wrong I still wish people would abstain from animal products. It would be a much better planet if we didn’t abuse it so. But I know yelling at my aunt about pigs being slaughtered isn’t going to help.