Naturally, everyone has a different understanding of religion. I have never claimed to be an Islamic scholar; I am only a student of history and an avid reader of books on Islam by different authors, different sects, and all schools of thought.
To the best of my understanding while there is a history of the death sentence against the apostate as verified by the apostasy wars during the time of the first Khalifa Hazrat Abu Bakr (RA); I cannot find anything in the Hadith about the death penalty for blasphemy? Instead, there is a well-known incident about Suhail bin Amr, one of the elders of Mecca and the poet who composed poetry blaspheming the Holy Prophet when he used to preach Islam in Mecca.
Quote
“When he was captured into the hands of the Muslims in the Battle of Badr, `Umar Ibn Al-Khattaab approached the Messenger of Allah (PBUH) and said, "O Messenger of Allah, let me extract the teeth of Suhail Ibn `Amr until no speaker stands against you after today."
The great Messenger responded, "No, `Umar. I do not treat anyone harshly so Allah will not harm me, even though I am a Prophet." Then `Umar came nearer to him and the Prophet said, "Perhaps Suhail will take a stand tomorrow that will make you happy.” Unquote.
https://www.islambasics.com/chapter/suhail-ibn-amr
On the other hand in my own country; Salman Taseer, who never committed blasphemy himself and only defended the woman who was ‘Alleged’ to have committed blasphemy was shot down in cold blood by his bodyguard; the killer Mumtaz Qadri was hailed as a Saint and his grave is now a place of pilgrimage.
I won’t say anything against Mr. Khadim Hussein Rizvi because his case will be judged by Allah. My only comment is that IMO a lot of people in Pakistan are now so much obsessed with the Mullah religion that they have lost their sense of direction and ignore the true spirit of Islam.
While they are ready to kill and cause disruption through their 'Dharna' about something that happened in a country where the majority is not Muslim, they would merrily continue with dishonesty, adulteration of food, profiteering, and injustice, etc., which are contrary to the real message of Islam. Fiery speeches and foul language against the gov't and the army have no effect on Macron or the French, it simply makes it more difficult for more than 5-million Muslims living in France. Silent protests and petitions with millions of signatures would probably yield better results.
Like all Muslims, I am also deeply hurt when someone insults the person of the Prophet (PBUH) but I would not disrupt the working of a government through Dharna because instead of harming the perpetrator, it only harms Pakistan and the Pakistanis. IMO, in addition to the peaceful silent protest march. the best way would be to stop buying French things and quietly cut down on trade with France, but nothing that would harm the interests of Muslims and of Pakistan.