According to several hadiths,
Muhammad ordered a number of enemies executed "in the hours after Mecca's fall". One of those who was killed was
Ka'b ibn al-Ashraf, because he had insulted Muhammad.
[12]
The Prophet said, "Who is ready to kill
Ka'b ibn al-Ashraf who has really hurt Allah and His Apostle?"
Muhammad bin Maslama said, "O Allah's Apostle! Do you like me to kill him?" He replied in the affirmative. So,
Muhammad bin Maslama went to him (i.e. Ka'b) and said, "This person (i.e. the Prophet) has put us to task and asked us for charity." Ka'b replied, "By Allah, you will get tired of him." Muhammad said to him, "We have followed him, so we dislike to leave him till we see the end of his affair."
Muhammad bin Maslama went on talking to him in this way till he got the chance to kill him. Narrated Jabir bin 'Abdullah
—
Sahih al-Bukhari,
4:52:270, see also
Sahih al-Bukhari,
5:59:369,
3:45:687,
4:52:271
It has been narrated on the authority of Jabir that the Messenger of Allah said: Who will kill Ka'b b. Ashraf? He has maligned Allah, the Exalted, and His Messenger. Muhammad b. Maslama said: Messenger of Allah, do you wish that I should kill him? He said: Yes. He said: Permit me to talk (to him in the way I deem fit). He said: Talk (as you like).
—
Sahih Muslim,
19:4436
Muhammad declared that there shall be no punishment for murdering anyone who disparages, abuses or insults him (
tashtimu,
sabb al rasool),
[4]
Narrated Ali ibn AbuTalib: A Jewess used to abuse the Prophet and disparage him. A man strangled her till she died. The Apostle of Allah declared that no recompense was payable for her blood.
—
Sunan Abu Dawood,
38:4349 see also
Sunan Abu Dawood,
38:4348
Islam regards blasphemy against the Prophet a very heinous crime and the Quran strongly forbids blasphemy and makes 11 references to it: 2:88, 4:15, 5:17, 5:64, 5:68, 5:73, 6:19, 9:74, 11:19, 14:28, 39:8. They are all against it. At the conquest of Makkah, the Holy Prophet Muhammad (p.u.h.) announced general amnesty to all except those who were guilty of blasphemous acts and sacrilegious statements. Both Nasai and Sunan Abu Daud, famous Hadith books, narrate that a slave Jew woman was killed by her master for her repeated blasphemy against the Prophet and when the case was brought to the Prophet’s notice he declared no retaliation against the master. (Hadith No.4348)
@Hell hound @The Sandman
If you will ignore people the same way you ignore those who insult or humiliate sacred values of Islam, than only you could talk about following the Sunnah.
So, if someone insult you, your family, your loved ones, your country, your favorite leaders, your favorite institutions, then you must ignore them. So, your stance regarding blasphemy will be justified, otherwise hypocrite.