Hey, Londoners — been stabbed or shot yet this week? Just thought I’d check as the place seems to resemble, in its violence, downtown Mogadishu right now — and indeed is graced with many of the same kinds of people. That’s probably why you haven’t been stabbed or shot yet: the murdering has been committed exclusively, so far as I can tell, within the minority ethnic communities by young men who are either immigrants or the children of immigrants.