I want to know why there were not armed security guards at this Church. I know at my local Temple there are armed guards all over the place every Saturday morning for Shabbat services
No idea. That area of downtown is considered low risk. Most liberal place in the area meaning less armed people.
From USA today:
The suspect is a clean-shaven white male about 21-years-old with sandy blond hair, and is wearing a gray sweatshirt or hoodie, blue jeans and Timberland boots, officials said.