It could easily fool other people.
But Tsunade, standing right in front of him, was clearly not one of those people.
What Naruto didn't know was that...
Tsunade had received intelligence about Danzo and his party long ago. Danzo might have run Root so tightly that not a drop of information escaped, but among the Anbu under the Hokage's command, Kakashi and Yamato—the only person who could use Wood Release, though he wasn't even half-competent at it—had both spent a short time in Root. Tsunade naturally had no way of learning Danzo's confidential affairs, but as the Fifth Hokage, she could still obtain some information, as long as it wasn't too sensitive.
Then, just as the Six Kage Summit was ending...
The Anbu directly under her command had sent Tsunade more precise information.
Considering how serious recent events had become...
Tsunade hadn't gone straight back to Konohagakure. Instead, she'd headed south with Kakashi and Shikaku. Without Naruto using the Flying Thunder God Technique, their speeds weren't all that different. But Naruto had precise information about Sasuke's location, so he'd arrived a little over an hour earlier. That gap in their arrival times was the most direct reason Danzo had been killed. Otherwise, if Tsunade and Kakashi had joined the battle halfway through, Naruto would have had no choice but to openly turn against them if he wanted to stop everyone from leaving.
And there was another point: with Naruto's current strength, combined with Sasuke, Utakata, and Karin, he certainly had a good chance of defeating or even killing them. But if the others were determined to flee, wiping them all out would be beyond his reach.
After all, there was a huge difference between the other side standing their ground and being killed by you...
And the other side being