Do we assume that any person, organization, etc. that ever broadcasts information that isn't 100% pro gun in the manner each of us favors to therefore be anti-gun?
There are many perspectives on any story. Just because they run the story does not make them anti-gun or pro-UN. So are you suggesting that the only reason they are running the story is because they are anti-gun? If so, that would be just plain silly.
First, if you want to accuse them of bias, accuse them of running a story with a fairly blatant controversy and the story is about the controversy of people being upset, not the gun issue. They are running this as a way of making money. Whether or not UN folks are upset really isn't much of a story, is it?
Second, did you notice the nice plug for the NRA and their web site about stopping the UN gun ban? I don't think I saw any web sites for the UN listed.
Third, by running the article in this manner, it seems to be doing more to piss off gun owners in a manner to rally the troops as opposed to being in opposition to gun owners. LaPierre also got free advertising for his book. Go frickin' figure!