Apostate prophet learns rules of dialogue; when is criticism against Islam allowed?

In answer to the video "Muhammad's Destruction of Idols"

When the critic's aim is to objectively assess the Islamic arguments, carefully listen and evaluate the Islamic position, instead of shutting his ears or pretending to listen while preparing his counter arguments, telling others to do the same, raising irrelevant objections just for the sake of discrediting, without any solid basis for argument, isolating a word or a sentence from its context, hairsplitting it so as to make it a basis of doubts and accusations, misconstruing words so as to prevent them being properly understood 4:46,40:4-5,56,41:40 then a meaningful discussion can be engaged

16:125"with wisdom and goodly exhortation, and have disputations with them in the best manner".

The prophet's own life and ability to take on criticism is testimony to this. As well, Muslims can freely mingle with kindness and justice with any non-muslims who do not seek to fight Islam, do not opress Muslims unjustly 60:8-9. Although the prophet never initiated the kind of verbal attack he was calumnied with, when he was approached by a Muslim poet, Hasan bin Thabit, who proposed verbally attacking the enemy poetry that targeted him, the Muslims and Islam, he did not instruct him to steep to their lowly immoral, unwarranted standards. For example he told Hasan that his lineage shouldnt be attacked, meaning he did not want Hasan to provoke them on that point lest they in turn insult the prophet's ancestors.