Well, anyway. The reasons the Germans didn't get around to a full-on "final solution" until 1942 were certainly not because for the decade previously they looked for other methods out of the goodness of their hearts. Anyone looking at Hitler's actions in the 1930s in particular has to read them very cynically indeed (and after about 1942, if not before, his actions took on something closer to those of the deranged than the cold and calculating).
The entire programme was broader than Jews, as sp's link says, anyway. It remains one of the more chilling parts of history to read of the Nazis plans for almost the entirety of Eastern Europe. They weren't even subtle about their intentions to systematically, and completely, exterminate the local population as far as was possible. What noises they did make about other, less brutal alternatives were just a front.