Doesn't matter how far left leadership goes, the party can deal with anything undemocratic if necessary
It can, yes - though I wonder how likely this would be, once the party was stuffed with the ultra left wing?
It's also true that law has to be passed by the House, but isn't that partly what a decent majority is about (not that Labour will get one of course)?
Overall, but especially given their obvious communist leanings, Labour are a risk I'd rather not take thanks all the same 