Do you think law enforcement has the right to "act like they are the military"? (Read description)

About an hour away from where I live, a man robbed a gun store and is hiding in a town. He is considered a national threat and is obviously armed. The town is located in the lower part of Wisconsin and has a lot of trees and such (this is relevant).
Someone who I know on Facebook made a post saying that the FBI shouldn’t be walking around that town wearing camo and carrying military grade weapons. He thinks that the appearance of military force in small towns shows that we aren’t a free nation.
I disagree.
I think that they have the right to carry these weapons around because they don’t know what else he has. He also tried to disarm a cop a few years ago. Because of the amount of trees, they are in camo to be able to go into the woods to see if he is there without being obvious. This guy is considered a national threat because he wrote a 121-page manifesto that was directed towards Pres. Trump that was anti- government and law enforcement. So to me, it seems obvious that he isn’t going to just give up right away without a fight.
This guy thinks that they shouldn’t be walking around with weapons that they typically wouldn’t carry around because it’s scary looking and shows we aren’t a free nation. I say we should be carrying that stuff around because even if it is intimidating, it could be the thing that protects innocent civilians from being killed.
The main point of this question though, isn’t what is happening in Wisconsin, although you may discuss that. My main question is, should law enforcement be allowed to carry military grade weapons and walk around wearing military-style gear in situations similar to the one listed above?

I said “act like they are military” because that is how the guy on FB worded it