Just because some people from the left are like that, it doesn't mean they all, or even most, are. Just as I wouldn't lump in everyone on the right with some of the vociferous right.
We all have a point of view. I don't disagree that Thatcher did some good things but, for me, the bad was worse than the good. I also think that Blair did some bad things, the Iraq war for example. But I also think he did some good. Minimum wage and the independence of the Bank of England, for example.
The media like to lump everything as black and white but the reality is always somewhere in the middle. People just see it differently.
Clearly Labour were responsible for some of the banking crisis, but clearly not all of it otherwise we would be attributing a huge amount of influence of the UK economy in bringing the world economy down.
Clearly the lack of improvement in the economy under the coalition isn't all their fault, again the world economy shows it.
The press and PR after the event always exaggerates things. The late 70s weren't good but not as bad as sometimes made out. The early 80s weren't good either. Most governments leave on a bad note (not just Labour ones) otherwise they wouldn't get thrown out.
I don't want to be lumped in with George Galloway particularly and I am allowed to be of the left without being 'fluffy'. Its possible to genuinely have an opinion consisting of 'lefty' thoughts and not be a stereotype.