What is the ruling on insulting religion when angry, if the intention is to direct the insult at the addressee?

Cursing the religion is an act of disbelief according to the consensus of scholars. If such an act is uttered by a Muslim, then he has apostatized from Islam. However, if one curses the religion unintentionally, such as someone who intended to praise the religion but their tongue slipped and cursed instead, then they do not commit disbelief. An example of this is the story of the man who said, "O Allah, You are my slave and I am Your Lord," out of extreme joy, and he was not held accountable.

It is necessary to distinguish between three levels: 1. Intending the speech and the curse: This is disbelief. 2. Intending the speech but not the curse (joking): This is disbelief, because it is mockery. 3. Not intending the speech nor the curse (a slip of the tongue): This is not held against one.