The recent increase in stabbings and other knife-related crimes across Germany sheds new light on how the security situation has deteriorated since Chancellor Angela Merkel decided in 2015 to welcome more than 2 million migrants * from Africa, Asia and the Middle East to permit.People armed with knives, axes and machetes have wreaked havoc on all 16 German states in recent months. Knives have been used not only to carry out jihadist attacks, but also for murder, robbery, burglary, rape, honor killing and many other types of violent crime.