"To suggest that the Quran more than the Bible or the Talmud promotes intolerance is simply unfounded."

While it is true that the Jews and Christians disparaged one another, the extent of the condemnation of disbelievers (Jews/Christians/Polytheists) is the most persistent incessant theme of the Quran. The Quran is promoted as god's words pertinent for 'all people for all time'. 

While I reckon the relative amounts of disparaging 'the other guy' is an important comparison metric, the more important issue is intransigence as the Quran is promoted as being the very words of god. Rabbis had a crack at Jesus, and Christians had a crack at Jews - they were the words of adherents; but the Islamic cracking is being done by god's own words, allegedly. It's that authority that ingrains intransigence, the unacceptability of exposing Mohamedic foibles, the resulting imposition of Quranic values backed by Jihadi mentality and uber-sensitivity about 'Islamophobia', that causes so much concern.