We live in a free society because of order brought about by police. IMO, police should be able to bend the laws for the good of all. Speeding police can never be compared to violent crime.
Speeding police have killed many innocent citizens!
When authority figures start to abuse the laws, then anarchy is soon to prevail...
And yes, they have authority to speed, and blow stop signs, and stop lights, when they are on a call and they have their lights and or siren on or both.
But if they are not involved on a call and do it just because they can, then that is wrong and abusing their power. It sends out the wrong message to the people who see them do it.