Among the training of Syrian rebels in Syria are home-made explosives: Western responsibility

Western governments (notably US but also France and UK) have secret and not-so secret programs to train Syrian rebels: we know now (see yesterday post here) that 50% of US arms in Syria wind up in the hands of Nusrah (the official Al-Qa`idah branch in Syria).  Among the training that ISIS and Nusrah give is to make home-made explosives (from hair bleach and nail polish, as we learned from an investigation by the NYT of the Paris bombing).  Those graduates then spread around the world.  Western governments ignored those same Jihadi Syrian rebels when they were sending car bombs into Lebanon: they thought as long as they are hitting Lebanese, they don't have to worry about them.