The brutality against non-believers will cease when Islam no longer exists. Until that time, there is enough in the Medinan parts of the Qur’an and in hadiths Bukhari, Muslim and in the example of Muhammad to settle no limits whatsoever on how the unbelievers can be attacked.

Muhammad was most brutal when he could get away with it and there was no internal opposition to his methods.

There really is only one way to stay the hand of jihad violence: publicly pronounce the Shehada. Being offered the Dhimma is not guaranteed, and history attests to that fact.