The FBI has lied about about everything since Trump was elected and and attempted a coup.
Should we expect anything other than lies from them now regarding Qanon?
A domestic terror threat?
They have attempted to supply fake news stories to sell their hoaxes for years...
their modus opporandi for all their anti-Trump propaganda.
Pressed, Trump would not agree with FBI's position and condemn Q.
Nor, did he scoff at the idea of the necessity of ridding the world of Satanists, Pedophiles, and Cannibals.
Although he claims no allegiance at this time, he has only positive things to say about Q.
"Knowing little about it" provides him with necessary plausible deniability in the game as it stands at this time.