My history knowledge in this area must be below normal.
Why call up the Knights of Malta? Were they crusaders? Have a special connection to the Church of the Nativity?
While the authentic Knights of Malta are primarily a charitable and philanthropic Catholic organization
now without any modern military function,the traditions and symbols of the Knights of Malta do trace
back historically to pre-modern knightly orders more directly engaged in international politics, including the
Middle East:
Knights of Malta: Click Here
The prior post mentioning them was a joke. They're much more likely to be found providing food and medical aid around the world.