On a tangential note, it is utterly ridiculous that Dyab Abou Jahjah isn't allowed into the UK.
However, Corbyn actually seems to have led Abou Jahjah on a tour through the British parliament, even though Corbyn doesn't remember anymore, so if Abou Jahjah is being barred from the UK, it's something recent.
I'm very much for real. Abou Jahjah is nothing more than a go-to fringe 'islamo-leftist' for lazy Flemish newspapers editors needing to fill pages. I don't really see how that makes him a danger to public safety in the United Kingdom. It was annoying when people were hysterical about the guy back in the AEL days, by now it just shows a preference for stock-responses over critical evaluation. As for his comment on dead soldiers (which he rather frantically backpedalled from, by the way), literally thousands of people have said worse things on-line; it strikes me as an absolutely inane thing to do to pretend that he's some sort of scary terrorist with direct links to the Hezbollah leadership. It's as if Louise Mensch was barred from entering Bulgaria.
