I think the problem may be that the people one would expect to know something about "Septics beliefs?" as per the thread title, appear to have nothing to say about it but denial or deflection from the meat and bones of the subject of the majority of the posts they chose to make.
Scoff if ye may ... but doesn't your knowledge of the files stretch to the name of the guys lifting the tiles for forensic examination one of whom seems to have chiselled his blood into the equation?
Doesn't really matter though does it? There was no blood from anyone in the McCann family let alone Madeleine found in the apartment or any where else in Luz (key fob excepted where cellular material from Gerry was found).
Some sceptics believe otherwise ... and have absolutely no compunction about advertising their belief on the internet. That you wish to disassociate from them is I think very sensible ... I would too.
There are people in the world who don't believe everything the McCann's say. You choose to refer to them as sceptics. That's OK as a way of distinguishing them from those who do believe the McCanns; their supporters.
All a sceotic is, therefore, is a non-supporter. Some have formed groups, but the majority are individuals with only one thing in common; they view the McCann's story, or parts of it, with scepticism.
For reasons known only to yourself, you have decided that sceptics have shared beliefs. Not only that, you know what those beliefs are and often refer to them as in 'sceptics believe'. In my opinion every time you write such statements you should include IMO because that's all you are expressng.