No idea what happened to my website, it works now for me. It's not the most reliable webhost, because it is the ultra-cheap variant for something like five euro per month and with that pseudo promise of "all traffic included" (which of course is only true as long as you hardly have any in practice), so sometimes it just glitches. Since they make their money by giving their phone support at phone sex minute prices and react very slowly to email support requests, I only complain if a problem lasts longer.

ETA: Not sure I understand what you mean with the backstabber thing.