"Turning this into a war against all Islam"
That is a huge statement! I feel it is an incredible logic leap from what I posted before.
I used to translate Arabic, having learned it circa 1980.
With a number of Muslim friends, Sunni, Shia, Bektashi, etc. my intent is not to make "war against all Islam".
Although perusing your quotes of Mr Lewis may give one a feeling that - yes, the West has greviously misjudged not only Islam, but most other cultures around the world (probably because we're myopically focused on American Idol, Survivor or Trump's show) - for those of us who are informed, versed in both Arabic and Near Eastern culture, being aware of what the core tenants of Islam are is critical for our own survival.
Forget the western pundits - there are a multitude of historical and current examples. Take Lebanon and what has happened there over the last 50 years. It was normative Islam that drove out what used to be a majority Christian population and turned it into an Islamic country (by violent and terroristic means).
While not wanting to "take on all Islam" - it would be an enormous mistake for the west not to realize (peaceful muslim people notwithstanding) that the core of Islam is both terroristically hegemonistic and an historical bloodbath.
regards
I draw a distinction between Islam (the religious ideology) and Muslims ( human beings who currently follow Islam ). Islam is inherently evil. Its core embraces murder, robbery, and conquest. For Western civilization to endure, it must be defeated, just like National Socialism and Communism. This does not mean that all human individuals currently caught up in the ideology are evil beyond repair
The radical mullahs, and the wealthy ones who finance them, must go. After removing them from the environment, perhaps the rest can be redeemed