text: is suicide a sin in all religions?   no, not all religions believe that killing yourself or another being is a sin.  "rollin: historically, in most religious traditions, suicide has been considered a sin. in light of this, many survivors have felt religiously stranded. how can their faith help them heal when that same faith may fault their loved one for the act of suicide?"(pbs.org)  buddhism- under conditions of illnesses will accept suicide and dismiss it as a sin.  christianity- it is a sin under christianity, the bible says "thou shalt not kill" so take it as it's said. cain killed abel and god according to the bible said the following: "what have you done? i hear the voice of your brother's blood crying to me from the ground. now you will be cursed on the earth soaked with your brother's blood which was drawn by your own hand." and therefore, that instance became known as the first murder in the bible and the first broken family.  confusianism- also allows suicide under certain circumstances...such as illness  hinduism- hardly and rarely allows cases of suicide  islam- condems the idea and the action of suicide