So the Mind Palace gaining an owner meant that legends and demigods would lose access to their virtual copies. The owner of the Mind Palace can even block everyone from entering the Mind Palace with minds, so the Mind Hunters organization will cease to exist.
And if the angel succeeds in becoming the god of the pathway, he might even be able to influence and enslave the minds of everyone in the pathway or the minds of everyone in the world.
No one wants any of these. So they have to stop the angel from succeeding.
But they don't have the power to stop him anymore. This made them begin to contemplate giving Legion what he asked for.
They sent many messages to Legion saying, "You should join us to send the angel away. This is for your own good too. If you allow him to succeed, we are all doomed."