Apostasy in Islam refers to when a Muslim becomes a disbeliever by saying a clear statement to that effect, or by uttering words which imply that disbelief, or he does something that implies that disbelief.

Capital punishment in Islam is applied in the case of apostasy, murder, adultery, waging war against Allah and His Messenger, and spying.

If the sin has to do with something that is between a person and his Lord, then it is sufficient for him to repent, seek forgiveness, regret what he did and resolve not to go back to those sins. It is not a condition of repentance that the Hadd punishment be carried out.

Weed of all types is haram, whether it is marijuana or any other type. The remedy for stress and anxiety is not in smoking hashih or any other haram thing. For more, please see the detailed answer.

In Islam, honor killing is a transgression and wrongdoing because it is killing one who does not deserve to be killed, namely the virgin if she commits fornication, but the Shar`i punishment in her case is flogging and banishment for one year, not execution.