"Islamist radicalism is a demonstrable threat to the current commonweal, or none of the things from 9/11 to the caning of the unmarried mother in Nigeria to the murder of Fusilier Rigby would have happened. If we are not to single out any sort of specified entity for any sort of comment, than what is the point of this forum at all?"

I can't argue with more than the detail of that, any more than you can logically claim that Western interventionism has had any less of an horrific effect upon their countries, from the 1920s right up to now. Of course there have been many other instances since the birth of Christianity, of Islam being (unsuccessfully) targetted for extermination.

If you constantly visit upon others, invasions, pogroms and actions which lead to their deaths in thousands, what do you expect might be the result?

"Whatsoever a man soweth, that shall he also reap." (Bible: Galatians VI)

The atheist philosopher George Santayana wrote: "Those who cannot remember the past are condemned to repeat it." (The Life of Reason (1905-1906)).

That much misattributed quote is something that every Western and every Christian nation should examine in its every detail and nuance, before deciding to let the world look after itself, back off and mind its own cabbage patch, so as not to invite further hostility.