Fang Ze clearly understood: The ancestors of the Si Family and Old Mr. Bai of the Bai Family were seasoned individuals who had weathered decades of storms. They had the discernment to judge people.
Since both of them believed that He Weidao was wholeheartedly for the Human Race and could be trusted, Fang Ze was willing to tentatively trust their judgment as well.
Assuming He Weidao, no matter how filthy, how insidious and cunning, how vicious in his methods, all he did was indeed for the Human Race, for the Federation, and not for his own selfish desires!
Then Fang Ze could fully exploit this mentality, becoming the bad guy, using "disclosing the events of that year to other demigods in the Eastern Administrative Region, causing a rift between the demigods and the Federation, even prompting rebellion" as leverage to force him to make concessions.
