Ashikaga Takauji, a warlord of the Warring States period in Japan, was a man of compassion and kindness who was loved by his subordinates. He forgave even rival warriors who had defied him if they surrendered, and generously gave away land to his subordinate feudal lords. However, there is a view that because of his kindness, the authority of the Muromachi Shogunate declined, and the Onin War broke out due to the rashness of the feudal lords and others, plunging the country into the Warring States Period.
He was probably too gentle for a leader. Is inhumanity necessary for those who stand above others?There is a paradox called "the paradox of tolerance". If there is a society that is tolerant in all things, it will be dominated by intolerant people and eventually become an intolerant society. It means that being tolerant of intolerant people is not good for society in the end.
For example, people who commit crimes have their own backgrounds, and given those backgrounds, we may be tempted to forgive them. However, if we release them from punishment, we will be tolerant of the intolerant, and society will be in jeopardy. People will say, "If I can be forgiven for committing a crime, I will do more of it," and there will be many people who will be in trouble for their crimes. Therefore, today's society punishes people who commit crimes accordingly.
This is true for individuals as well. If you treat all people amiably, you will be exploited by those who have malicious intentions and you will eventually expose yourself to attack.