Why does FEMA have against armed police officers?

I agree with the Phoenix mayor. Opposition to armed police officers seems incomprehensible. One can easily conceive that this policy will result in deaths in the future.

The Phoenix Fire Department's Urban Search and Rescue team has been suspended by a federal agency because it brought armed police officers for protection on hurricane relief missions.

The Federal Emergency Management Agency's conduct code prohibits urban search-and-rescue teams from having guns.

Phoenix Mayor Phil Gordon called the reaction from FEMA "stunning, unbelievable, bewildering and outrageous." . . .