There is simply no evidence that American military training would produce better police than extant American police. Nothing other than the self-aggrandizing claims of people who claim to be veterans on the internet. Claims that usually go unchallenged, and repeated uncritically (as above), because this country has a culture of soldier worship.
Besides the evidence to the contrary which I have already posted, I think you need to be more skeptical of the claims American soldiers make about their conduct in Iraq and Afghanistan. Talk about rules of engagement is cheap, what matters is the actual execution of those rules. American soldiers were made to behave as police in those countries, and in neither case were they good at it.
American police are bad enough already, the last thing they need is even more military training.
Besides the evidence to the contrary which I have already posted, I think you need to be more skeptical of the claims American soldiers make about their conduct in Iraq and Afghanistan. Talk about rules of engagement is cheap, what matters is the actual execution of those rules. American soldiers were made to behave as police in those countries, and in neither case were they good at it.
American police are bad enough already, the last thing they need is even more military training.