Regardless of what ideology is outlawed any law that lets somebody kill another freely is going to be rife with abuse, false accusations by those wanting revenge on those they don’t like etc.
All that is to say if there is such a law in any country that lets a person kill another without any kind of due process it’s going to be an issue. We see this even now with the impunity some law enforcement kill “suspects” with no actual weapons found and where even the initial interaction was for something frivolous.
Now imagine anybody being able to do that for any reason and then just claim “they were a nazi, drug dealer, pedophile, etc etc.”