[user104658]

Originally Posted by bitontheslide

I'm sorry, but thats not true. Its a democracy, so people have the right to stand provided they satisfy the rules, but that doesn't mean he will have access once elected to issues related to security if he does not have the clearance for a particular level.

You're going to have to provide some sort of reference here for this to be anything more than opinion for me, I'm afraid.

I've done some (admittedly, brief) searching and all I can find is a handful of opinion pieces and quotes from what I would call disgruntled ex-security employees with seemingly a heavy Tory bias. Unless there is something more than that out there, it simply isn't ringing true that Corbyn is a "terrorism threat".