I finished the mission "The Collar" I took off the collar, and I escaped from the prison, but it is normal that now every guards attack me on sight? I can only choose whether to return to prison or attack them ...
Well you ARE an escaped prisoner on what is extensively a order run by a militaristic religious order that is pledged to either cure you or exterminate you.
Assuming the game didn't just default to them killing you... Your options are fairly limited to cowing them or donning some sort of disguise.
