Jaakko holds his tongue. He shakes with resentment in his roosterpit. His blood boils with anger and he sees red. Surrendering to the Imperials or collaborating with them is unthinkable. He wants to avoid nuclear war, and prays that Tarkirov wouldn't be so stupid, or that Aesthian intelligence and government is actually worth a stuff, but collaboration with the enemy, and Raiden, who have sold out, is unthinkable. He reasons that his own best option is to make it to one of his own fleets and refuse to take off again. He'd sooner be sent to Aesthian military prison than conspire with the Imperials. Even if it meant killing Raiden, but they've earned it considering that they have conspired against Aesthia and were ready to kill him.
Or rather, Xiaomei, the unlikable, conniving bitch was ready to kill him. The other Kintharians seemed much less willing.
Tippy speaks reason. Nothing will be allowed to happen until he hears back from Bell.
"Nothing will happen until we hear from Bell," Jaakko affirms gravely," And who is controlling Ellie's aircraft?"