Flynn was so horny to kill 'radical' Muslims that he turned to the guys that just attacked America for help. And the Russians knew they had an eager ally at the highest levels of American power. That's what the transcript shows. https://www.thedailybeast.com/mike-flynn-asked-russian-ambassador-kislyak-for-alliance-against-radical-islamists-on-infamous-phone-call

But Flynn -- and the other members of Team Trump -- know that, at the very least, the optics of such an alliance are terrible. Hence the request for secret Russian comms; the furtive meeting in the Seychelles; and Flynn's lies about the call with the Russian ambo.

What do you call a group of people so hungry for an alliance with America's attackers that they're willing to lie about it at every turn? If you're on Team Trump, you call it "no big deal." But you can see why the FBI might have labeled that a major intelligence risk.