Lord Zhenjin's protection of the Big guy did not damage his authority.
Perhaps others didn't understand, but their admiration and love for Lord Zhenjin remained overwhelming.
Lord Zhenjin was a Divine Favored Knight, the strongest in personal combat, who also had the titles of Holy Temple Knight, heir to the Hundred Needle Family, and future White Sand City Lord. He also had a group of followers who always stood by him, and the most capable competitor, Zong Ge, also showed obedience. Lord Zhenjin's leadership was unbreakable.
After consoling the wounded, Lord Zhenjin received numerous expressions of gratitude.
It was the Big guy whom people loathed and guarded against, not Lord Zhenjin. In fact, if Lord Zhenjin hadn't knocked out the Big guy, they would have been in greater danger.
It was Lord Zhenjin who had saved them.
If the Big guy were an unforgivable killer, perhaps someone might still question Lord Zhenjin—Is this the justice of a Holy Temple Knight?