The repellent spectacle of Muslims demonstrating in Luton against the British soldiers returning from Iraq does more than turn our stomach.
It tells us in graphic form that this country has not only utterly failed to combat a threat to itself from within but - astoundingly - turns not against those who threaten it but against those who seek to defend it.
When the returning troops of the 2nd Battalion, the Royal Anglian Regiment paraded through Luton they had to run the gauntlet of Muslim protesters waving placards saying: 'Anglian soldiers: Butchers of Basra,' and 'Anglian soldiers: cowards, killers, extremists.'
Not surprisingly, this enraged the rest of the crowd of decent, patriotic people who had turned out to welcome the troops home. Yet the only arrests made were among those who objected to the Muslim provocation, including a man who shouted something at them.