I have to admit that I viscerally loathe defectors. So don't expect any nice words of regret at losing Sajjad Karim to the Tories, for whatever reason he thinks justifies his actions.

But back within the party he has just run away from, I wonder whether it has any importance. One of the things that Nick Clegg got plenty of plaudits for recently was the idea of an "earned amnesty" for existing illegal immigrants, a measure that I have not seen Cameron, even last week in Prague, beat. But given that this is one area where we have clear blue water between us and the Tories on if Sajjad thinks we've made a mistake, does this translate into a bit of a blow for Nick's policy?

Me, of course, I'm an open borders advocate. You cannot expect to have free movement of goods and services without free movement of people. The challenge is not how to stop people coming here for whatever reason, but to help build a world in which people do not feel the need to migrate simply to better themselves in a minimum wage job.

Such a task is not one for the petty isolationists in the Tory party, and will need a truly co-operative internationalist party to understand. Which is, in the UK, only the Lib Dems, at least of the major parties.

Here's some century old words of wisdom and humour for Sajj:

I often think it's comical -- Fal, lal, la!
How Nature always does contrive -- Fal, lal, la!
That every boy and every gal
That's born into the world alive
Is either a little Liberal
Or else a little Conservative!
Fal, lal, la! —
(Iolanthe, Gilbert and Sullivan, 1882)

"Liberal Conservative" or "Conservative Liberal" are ideological oxymorons. Sayonara, Sajj, I hope you really do know what you are joining.

UPDATE:  It just goes to show what people will read and what they won't that this post makes it into the "Golden Dozen" and some of my more thoughtful posts don't!  Maybe I should try to be salacious more of the time!