The whole paradigm of eating meat seems to be based on encroaching on the lives of others. It begins with animals, then finds its way to people too. No doubt, your family wants to be with you, but trying to shame you into it is flat out wrong. I think your family is trying to transfer their own feelings of guilt, over what they do to others, onto you. Don't let them. The shame is theirs.
I'm really sorry you're having to go through this, and I hope they learn to connect with you in a more positive way.
"There is more wisdom in the song of a bird, than in the speech of a philosopher...." -Oahspe
"The thing is, you cannot judge a race. Any man who judges by the group is a pea-wit. You take men one at a time." -Buster Kilrain, The Killer Angels -Michael Shaara
"Anyone who doesn't believe in miracles isn't a realist." -Billy Wilder