I said that if they didn't like the gift, they couldn't be my friend.
Why would you stop being friends with someone if they didn't like a gift?
Yes, i think it is offensive to have a gift rejected.
I can understand being hurt if someone doesn't like a gift you gave them, but it's petty to end a friendship over it. The person might have a reason for not liking the gift that doesn't even have to do with you, so it would be better to talk it over.
It's not a big deal. I don't like people who can't be polite.
I see your point. If they reject it and are mean about it I can understand why you might not want to be friends any longer.