Monsanto is an extreme case, and therefore inspires a lot of passion. I'd say the vast majority of people on HN are pro-capitalism and pro-innovation, but have disparate views on business ethics and the efficacy of various regulations. In the eyes of many, Monsanto crosses the line between "good honest competition" and "dangerous and malevolent would-be monopolist."

Also: Way to paint people you disagree with on this issue as "very anti-capitalist, anti-innovation, pro-taxes..."