Islam : The penalty for apostasy is death

Apostasy in muslim majority countries.      Death Penalty      Emprisonment, loss of children parental guard      Illegal or criminal conversion

Sahih al-Bukhari 3017 Vol. 4, Book 52, Hadith 260
`Ali burnt some people and this news reached Ibn `Abbas, who said, "Had I been in his place I would not have burnt them, as the Prophet (ﷺ) said, 'Don't punish (anybody) with Allah's Punishment.' No doubt, I would have killed them, for the Prophet (ﷺ) said, 'IF SOMEBODY (A MUSLIM) DISCARDS HIS RELIGION, KILL HIM.' "

Sahih al-Bukhari 6922 Vol. 9, Book 84, Hadith 57
Some Zanadiqa (atheists) were brought to `Ali and he burnt them. The news of this event, reached Ibn `Abbas who said, "If I had been in his place, I would not have burnt them, as Allah's Messenger (ﷺ) forbade it, saying, 'Do not punish anybody with Allah's punishment (fire).' I would have killed them according to the statement of Allah's Messenger (ﷺ), 'WHOEVER CHANGED HIS ISLAMIC RELIGION, THEN KILL HIM.'"