The Pirate Party MEP is part of the Green group, and naturally voted against. So did the people in the European United Left–Nordic Green Left, part of the EFDD group including UKIP, and most of the non-grouped far-right parties. So the article is wrong, it's not only the greens that are opposed. You can see how people voted on votewatch.eu

Unlike the other nobel comittees the comittee consists of members appointed by the parliament of Norway. While the peace prize will be controversial by nature, having a politically appointed committee isn't helping.

One of the two MPs said he nominated both Snowden and also Manning a few months back not sure why this suddenly made big news again now. He also nominated Wikileaks in 2011.

Far from every western country has laws that prohibit what he did.