Because 'alarming' implies that it's unexpected, of which this isn't. As someone who has a retired police officer related to the family, nothing they do is surprising.

The fact that it was public wasn't surprising, either. If one thinks that they're better than other people or have more power or think that they're some type of authority, they will always, inevitably, use it. The Stanford Prison Experiment could be a good example, but you could just look at how some adults justify abusing children, or how slave-owners used to justify slavery. People who see themselves as good, as though it's a character trait, will always justify lesser behaviors. It's why I'm always leary of people who market themselves (or are marketed as) being good or virtuous. That's a type of advertisement of expectation, of both themselves and their group, that will always lead to disappointment, raise red flags, and makes me ask why they feel the need to do so in the first place.

I'm not saying that what they did was right - it wasn't. The fact is, people who are marketed as good should always be thought of cautiously. No one markets themself as a good person (or people) to others, unless they're worried otherwise might be thought.

Just my thoughts.