Actually I think you're wrong on that - Labour activists seem to have a particularly macho culture in my experience - hence them calling this woman a scab.... I dread it when meeting Labour activist friends of friends because they tend to be so unpleasantly hostile to me (as a Lib Dem).
In other Lambeth Tory news - Clare Whelan (Conservative councillor for Thurlow Park and wife of John Whelan) is on the shortlist for Norfolk South West (a safe Conservative seat IIRC).
Yes I know what you mean about the Labour people (or some of them at least) - they seem to take it as betrayal of the cause if you even think of not supporting them or even suggesting that another political party/ political opponent might have a good idea or might be worth talking to for the greater good of the area.
In my experience Clare Whelan and the Tories generally in Lambeth seem to be alright: at community events and hustings etc that I have gone to they have always come across as reasonable not the objectionable types you sometimes see in other parts of the country. Not that I'd ever vote for them...