Under normal circumstances, the Tiandu division would definitely seek justice for this matter, and a set of emergency orders would be issued.
In other words, the cost of one person's life would be repaid with the lives of ten people. As the human race had wiped out 10 million members of the Flor race, so they would have to sacrifice the lives of 100 million humans in return.
Since this incident had already happened, they naturally did not want the same tragedy to happen to the human race when the other races banded together to punish them. After all, it was unlikely that everyone in the human race supported the war effort.
If the human race was exterminated as well, then things would spiral out of control, and possibly many more wars between races would erupt.
In any case, there was a reason behind the ratio. They believed that one person only dared to do such a thing because there were at least ten people supporting that person's actions.