Maybe kinda in some circles? I suspect almost none of the tech-worker urban liberals who are the majority on HN would embrace that as a parenting notion. Even among military veterans, your phrasing would likely sound a bit off the mark. They would generally see the call as being about protecting other people and serving their country.

To address your second sentence, most people see a big difference in morality between "Protect the innocent from people who would harm them" and "Harm the innocent".