Austria and the normalisation of Islamist terror

A 23-year-old Syrian asylum seeker slashed at passersby with a knife in Villach , Austria .

A photograph of the grinning alleged killer doing a one -finger salute, a gesture co-opted by ISIS , as he was apprehended fuelled speculation about his motives.

This follows not only last week's Munich attack, but also last year’s foiled attempt on a Taylor Swift concert in Vienna .