I disagree that they are difficult to keep in check. Jan 6th was a failure of capitol police and other law enforcement agencies. The mob that breached the capitol was around 800 people, which is easily managed by a small police force.

They had ample evidence that these protests would be in the tens of thousands. I'm sure you've seen the police presence for BLM protests, so I think the response here speaks for itself. I honestly don't see how this indicates the far-right are difficult to keep in check. It really shows that law enforcement didn't even try, either because they didn't believe they would become riotous or violent, or (hopefully not) for more nefarious reasons.

That's part of the issue though. Difficult to keep in check means militarizing our Capitol. That's not a good thing and is bad on many levels.

Why? There are over 1,500 capitol police officers. That's more than enough. Militarizing the capitol the way they did was total overkill; security theatre that they used to get a bigger budget.

Because security is an illusion, and theater is a part of that. January 6th shattered part of that illusion and, having happened, it is now a part of the consciousness. Every protest will now be a possible threat, a chance for fear to win. Until there is enough time passed for it to fade it must not be reproduced. Also, I don't want a situation where 1500 capitol police even have to defend our institutions. Getting to that point is already a major lose.