... there's a difference between "left-wing" and "liberal". To be a liberal means to believe that tolerance is good and global warming is bad, but also to believe that you can save the world simply by not using the word "poof". S/he may have good intentions, but doesn't seem to appreciate that all the things s/he considers to be civilised - democracy, universal suffrage, the right to exist without having the shit kicked out of you for having long hair or skin that's a bit on the dark side - were achieved through the effort of rather more pro-active people, who fought and occasionally died in order to create a less appalling version of humanity. To be a liberal means to shield yourself from the full horror of your society, to have a veneer of civic responsibility while still approving of a system that's wholly founded on exploitation.
And this is why political activism is still necessary - because what freedoms the vast majority have were only ever won by active rebellion. I fear that an increasing proportion of liberals - among which I count most of the people who read blogs like this - are all for a global system of slave-labour and oppression, as long as they're part of the 15% privileged slaves who live in fancy cages with internet access and don't get physically whipped.