By that logic, the fact that penispowerworldwide.com is banned on HN* means we're biased against your politics.
Of the 67k sites banned on HN I would guess that fewer than 0.1% are "news sources", left- or right- or any wing. Why would you expect them to show up in a random sample of 10?
* which it is! I've unkilled >>1236054
for the occasion.