We don't need that kind of rhetoric on HN.
Part of the reason I suspect Bing/DDG return right-leaning content is because grassroots US internet culture itself slants slightly to the right (as it slanted to the left back 10 years ago). Whereas Google pushes authoritative sources heavily, which tend to skew corporate-left.
Corporate content is less likely to push flagrant untruths (unlike grassroots extremists on either side), and what propaganda there is, is usually much more subtle.
A balance is needed, to be sure.