I'm extremely curious to know exactly what about the comment you're replying to sparked the "liberal" label. I don't want to create a political discussion here, but it seemed like the reply was taking pains to suggest it would be neutral.
2. There seems to be an inordinate amount of money pouring into campaigns to discredit the sort of thing you might focus on (e.g., climate change[2], which is seen as a liberal idea[3]).
3. Less seriously, it was sub-text'd from Colbert's "Reality has a well-known liberal bias." [4]
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[1] http://stateofthemedia.org/2013/cable-a-growing-medium-reach... (2012)
[2] http://www.theguardian.com/environment/2013/feb/14/funding-c...