Like other western nations, Germany has allowed 'humanitarianism' to take precedence over internal security and citizen safety.  What motivates such attacks? A very strange hatred and competition between different sects (Sunni vs Shia) and within different schools of Islam. Shouldn't we point out the 'root cause' instead of wringing our hands before providing more generous aid to those 'seeking asylum' when their own 'religious brothers' in wealthy theocratic Middle Eastern nations will NOT assist them because the same venal hatreds of those sects or schools exists therein? Just because people are looking for opportunities in 'the West', it does not mean they want to join mainstream society or stop their hatred of 'infidels' who include other Islamic sects or schools, as well as non-Muslims. When will we recognize the nonsensical divisiveness of religious myths, particularly when some seek the opportunity to do harm while accepting financial aid?