Do you agree that we shouldn't be judged by our sense of humour?

I will try to explain with example and here is what I really mean:
Suppose that I’m walking with my friend and suddenly a group of people is making fun of my friend’s body weight by saying that “She’s the fattest chick ever alive, her mother must be an elephant, no a whale, you baby fatty whale!”, everyone is laughing, including me, because my sense of humour deem it as funny. Even though my conscience know that they’re being evil, the natural instinct of my sense of humour just automatically kick in, but that doesn’t mean that I condone such action! I just find that their joke and her antics in retaliation were funny.

Now here’s the problem, she thinks that I’m with this group of people, that I enjoy making fun of people like her. I tried to rationalize with her that when something is funny, it’s funny. She just won’t tolerate or understand different sense of humour that different people have and that it doesn’t necessarily mean they’re evil. I will laugh on her when she slips on banana peels but I’ll also help her to get up, but that doesn’t change the fact that her fall has tickled my sense of humour.

Have you ever found yourself in similar situation? Do you even have peculiar sense of humour that others often misunderstood? Will you judge other people based on their laughter even if it’s against you?