The FBI had nothing to do with this. It was a private company firing a private contractor.
Don’t read conspiracies into every event.
You are wrong.
According to the article Fox News sites,
“Minneapolis police Lt. Bob Kroll said that the site that EPG was guarding was left shorthanded after several of its officers were yanked away by federal authorities.”
Key words , “by federal authorities “.
Furthermore, it certainly the Feds, and here is the FBI talking about playing a supportive role to the Minneapolis PD. Let me provide you a quote and link.
“The FBI has also offered other expertise and resources, including taking responsibility for credentialing thousands of public safety officers and volunteers who will need varying levels of access to Super Bowl venues.
“We are facilitating the name checks and records checks for all the folks who are going to get credentialed,” Rivers said. “That means volunteers, food vendors, private security people—the number of individuals could exceed 30,000. That’s a huge commitment from our office.”
https://www.fbi.gov/news/stories/super-bowl-security-2018