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I don't know if it's comparable though;
Cameron's had a pretty steady two terms, with ministers falling into line at important points (i.e elections) despite bickering about the EU that's only really climaxed in the last 3 months.
Corbyn's opposition has been beset by infighting within the PLP from the moment his candidacy was secured despite then earning a huge mandate from the party members. The PLP clearly oppose not just their leader but the policies and principles that he (and by proxy their members) represents.
Instead of staging mass resignations the cunts could be trying to perform some kind of valid opposition that gives value to their salaries.
The Tories seem to make it work.