Definitely not firmly set in my ways when it comes to spirituality, I'm not so sure that INTPs are. I'm open to anything that brings motivation, direction and insight.
If you said you were going to slash a chef's tires, I wouldn't believe you in the first place, and I'd take it as a joke. If you were to tell me that I should go and give them a piece of my mind for low quality food, I would start reasoning that the chef is probably stressed, overworked and frustrated by angry bosses and can't deal with it, I'd go and tell him to keep calm, take it easy and stay in control. The chef won't deliver quality meals if s/he rushes them, it would be better to do it to perfection, and not blame himself when there's likely not enough workers, or too much demand.