My bits:
First, ultimately, I think when you commit suicide, it is always for yourself, except the immolating monks et. Al. I have never heard of a sad person committing suicide by selfless deed. Nobody writes a note saying how much their life sucks and takes off to Africa and helps people until they catch something and die.
Second, if you believe in an afterlife, there is no reason to kill yourself. You will now get to hear everything those people say BEHIND your back. You will meet some nice people, but I imagine they won't be happy with what you put your family through.
If you do not believe in an afterlife, then killing yourself prevents any chance of being happy in the future. Only if you are in excruciating physical pain would it make sense.
Ergo, in neither case is committing suicide because you were insulted a good idea.