Whilst I accept what you say is true Ken, he also voted against 496 other motions against his own party (roughly).
It's really easy to not have any power or responsibility and simply be against almost everything those that are actually in power (or wish to be) come up with, but I'm sure that he will be in for a shock now he's the one who has got to come up with policies that will both hold the party together (he's lost on that one already) and give them a chance to gain power next time.

In all organisations there are outsiders who just sit and snipe at others who are trying to do their best at running the things, it's easy, they just pick the very few things where they turned where they turned out to be right and shout "I told you so" and conveniently forget all the other times when they were anti and things turned out good. The boot is on the other foot now :-)