Why is Biden releasing Routh's ‘manifesto that put a $150K bounty on Trump's head’

Why is the Biden administration releasing Routh's “manifesto that put a $150,000 bounty on Trump's head” when “the FBI wouldn't release the Nashville tr*ns school shooter's manifesto because they said at the time they didn’t want to inspire more violence”?

What's also strange is that the FBI decided to cherry-pick only the first page of Routh's manifesto for public release.

According to law enforcement sources, "publishing Ruth's letter is essentially giving the public a blueprint for the next assassination." Yet, they deemed it appropriate to make this part of the manifesto public.

What the heck is going on here, and who is making these decisions?