Does anyone know if Teresa May got this legislation someone linked to upthread, on stripping people of their citizenship, through? Strikes me as very bad law indeed - no due process, no clear definition, could be used on anyone the home secretary takes against, even if she's mistaken, rather than being restricted to actual terrorists.
The history of this is interesting. I was horrified when I learned that the brave young men fighting fascism in the Spanish Civil War had to be smuggled back into this country. Because the pre-WW2 government was so keen to appease fascists they pegged decent men fighting extremism as dangerous, rather than, for instance, Franco or Hitler.
BUT if it was done to these brave men, I don't see why it can't be done to actual terrorists. Can't we refuse them entry if they turn up at a UK border?
And yes, if they want to go and fight for a Caliphate, they've chosen to abandon and betray the UK, so they shouldn't be allowed to crawl back here when they are injured or defeated or have had enough.
We do need to be careful that we have identified actual terrorists, though, not some poor sod like that doctor who went to Syria to treat horribly-injured civilian victims and was kidnapped and imprisoned (and killed, but there may be other cases of people who manage to escape).