[danielf]

In fairness, there is a fair amount of tribalism coming from the Tory camp as well. Just as you get Labour voters blaming Thatcher for all the world's ills, you get Tory voters bleating on about Labour in the 70s. For God's sake, that's nearly 40 years ago.

Personally, I blame the FPTP system and resulting seesaw politics for these entrenched attitudes. You don't get nearly as much of this in countries that are used to coalition governments, as you frequently get the equivalents of Labour/Tories ruling together. Nobody in his right mind would be bleating about what one particular party did wrong 35 years ago, as they probably did it in coalition with a party that is more palatable to the person in question.