No, it was the strange shouty cult.Hmuda said:Hm, I might be wrong but I remember some explanation about Condemned1's agression-wave. It had something to do with the toxic anti-pest chemicals used earlier on that orchard (with that Hatred-guy as a side dish).
It's just that all the explanation of it, and Ethan's connection to it, is in the documents you can read as extras for getting achievements, rather than the game itself.