> I was not trying to imply that this does not deserve investigation. I just thought that it was relevant to point out the agenda or ideological bias of the source because it helps to know these kinds of things.

As noble as your intentions may be, it's unnecessary and muddies the conversation if you keep adding cherry-picked information about your view of the politics of those involved.

Also, "left-wing" and "right-wing" are not particularly useful terms as they are ill defined and vary from place to place (e.g. the U.S. left-wing is considered very right-wing in most of Europe).