This is an interesting way of putting it. Because 'the narrative' seems to be that this bloke stabbed people just because they were jews. When, a better way of phrasing it surely is that he stabbed them because he was an anti-Semitic moron, and I suppose a bloke. (Speaking as a bloke myself, not anti-Semitic and not necessarily a moron.)
I'm not really sure what can be done to prevent this kind of thing really, despite the reaction of the Jewish community. Though of course, that all said, in this case the warning signs were there, as with the Nottingham attacks, and all the concurrent failures. But usually the lone wolf attack is hard to predict.
When the bomb went off at the Ariadne Grande concert, there was plenty of criticism of the way the arena security failed to spot it, and the way the ambulances responded, but I don't know how you compare the actual deaths of scores of young teenagers and what went on here. Again, both Islamists, both morons, both violent, both blokes, that's the common denominator.