One thing you can count on is that Germany will bounce back from this. So I don't think you should stop backing them. You can see today has the vodoo which says that a defending champion will lose their first game in the next tournament. The last time it was Spain, and they got disgraced by The Netherlands. With today's game it was more of complacency from Germany and some luck for Mexico. I expect Germany to qualify from this group.
Yeah most of the time they will just keep advancing to the next round. Thats what happen when you put germany in a tough spot, they will just breakthrough of it. I wonder will this first loss will just keep on motivating them to do better in the next matches because it is lame to see them lose like this especially in the first game