most of muslims do believe that apostate desrve to be killed. But majoriry of them believe in killing him under some law which may be crafted by the state, this is what separates them from extremists but the way things are being decided on roads nwadays throwing aside the sanctity of parliament, no wonders if someday such believers in stat and parliament will also join extremists to do mob justice.

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And Allah Knows, while you know not. (Al-Quran)