Is it ok that I find it funny when people get sad or angry?
Why would you think that's funny?
I find it funny to watch people being unhappy
You are just a sadistic person if you find the misfortune of others amusing, it is not healthy at all and you will be called out as a troll or psychopath if you refuse to sympathize with others. You have to learn to be nicer in order to have healthy relationships.
This isn't funny. I hurt people on purpose and it's hilarious.
Don't you find it hurtful do laugh at other's agony? How would you feel if when you were upset that others took enjoyment in your unfortunateness. You should try to learn and practice some empathy to get a better sense of awareness.