The Apostasy which is penalized by death by the four scholars is not the peaceful one but rather the state by which the person declares rebellion to the religion of one God as the case was then for the people who were put to death.

For further proof i will let you know that a person who had travelled with the prophet to Abysinnia or Ethiopia accepted christianity and he was allowed to do so. Infact he didnt even need any allowance.

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