This argument of yours does not seem to make much sense.. Germans and central Europeans are getting Russian gas even today.. they are getting it via the Druzhba pipeline crossing Belarus and Poland (nothern branch) and Ukraine, Slovakia, Czech Republic, Hungary and Croatia (southern branch). The NS2 pipeline changes virtually nothing on this situation, the only exception being that it connects Germany with Russia directly and using bypasses towards East it can pretty much cut off Ukraine from the supplies completely. But how is that a problem US need to care about is beyond me.. (?)