Konoha conquers the strongest Lei Wu

Todoroki guessed that the Seven-Tailed Jinchuuriki was most likely in Kusakure Village. This was a result he deduced when he knew the relevant information in advance.

Konoha obviously does not have these clues, at least until they figure out how Takigakure Village was invaded, they will not connect Kong Ninja with this incident.

After they found the relevant clues, they needed other clues to connect the three of Sora Ninja, Kusagakure and Iwagakure. Finally, through ancient rumors and stories, they were finally able to know that they had captured the Seven-Tailed Jinchilla.

The reason for force.

Konoha's ninjas will eventually get the truth about the matter. This is something Todoroki has never doubted, but when they will find out the truth is questionable.

Honglei doesn't intend to get involved here. What's sealed in the Box of Bliss is a monster full of destructive desires. Its existence has no benefit at all to Avalon, and even if the Box of Bliss goes berserk,

Those who suffered the first wave of attacks were also Kusagakure and the ninja villages around Kusugakure. This had no impact at all on Avalon, who was far away from the center of the ninja world.

Oh, that’s not entirely true. The Box of Bliss can brainwash the people who have been sealed by it, and then release them to fight like zombies. For example