laugh is a sin!

Arrrrrrr...!!! so angry... today i knew a lesson tat "laugh is a sin" and people who make fun is "very vain or perasan"... now u know? i been critic by someone just because of making people laugh... "people shouldn't laugh... people should cry...?" i don't understand lah... maybe she live without happiness... i should pray for her i think?
OH GOD, HELP MY FRIEND PLS... SHE REALLY REALLY WEAK... AND PEOPLE DON'T UNDERSTAND HER... PLS GOD BLESS HER... thx... AMEN...