I am overly cautious with my dogs and never
put them in a situation that might hurt them
or others.
It is a shame about some insurance companies not
insuring certain breeds. Any dog can bite and my thinking is:
It's not the dog that is bad, but the people that
own them can make them dangerous.

P.S. Our family owned a very protective GSD about 25 yrs.
ago. Best trained dog, but extremely protective.
Training, socializing, and being careful really pays off.