Militarizing the Police - Why? Does it Accomplish Anything?

IMHO we don't need a review of the weaponry itself but the training, ROE, definitions of imminent danger and decision making involved in escalation of the use of force up through use of deadly force. It seems all too often, things go fro 0 to 60 in nothing flat because the patrolman makes the call - in some cases warranted - to immediately escalate before the police command can review the tactical situation.

As you mentioned, gangs, drug cartels, and terrorists do hold access to weapons that currently outclass our law enforcement.

Setting aside the fact that there are cops who abuse their positions and power, there are plenty more who don't. As someone who has family members in the local law enforcement for a major metropolis, I find it disturbing that pretty much all they are allowed to carry is small caliber handguns.
When I personally own a high caliber long-ranged rifle, and if I wanted I could just go down to the gun store and get another; plus ammo, a better scope, a bi-pod for the front end to help keep it steady, etc.

My point is simply this.

It is difficult for Law Enforcement to maintain Law and Order, if it is far more easier for those who choose to break the law to outclass them in weaponry.

Which is where the basis for removing high powered weapons from being able to be purchased by civilians and making them illegal. Which won't do a damn thing towards actually solving the issue. All it will do is strip law-abiding citizens of their ability to use and own such weapons. Its not going to stop a gang member from not owning and carrying a sub-machine gun or high powered rifle. Just those that choose to follow the law will be punished for something that is beyond their control.

If Law Enforcement should be able to be properly equipped to at least match the situation they find themselves in.

What ever they need to destroy the bad guy is fine with me.