Cops belong... Hells Angels belong. Maybe not all of them. But that doesn't matter. If you have a problem with a mason. You have a problem with all masons. Doesn't matter whether they like you are not. If their brother asks a favor. They do it. The reason is irrelevant.
They may not even like each other, but they are brothers nonetheless. This can be confusing to the rest of us, because we cannot make sense of a certain alliance between two people that seem to dislike each other.
Also, I must add. That brainwashing is a SLOW process. That one is brought into the MASON circle as a good man. Slowly, bit by bit, they are changed. To the point that an evil act is justified by "for the good of us all; the BIG picture".
Also, Masons don't just go out and beat people up. They enjoy cleverness to their evil doings. They get a "kick" out of clever killing.