If Li Zheng really did follow the internet line to cut someone down, as long as they're not the ones dying, they'd be even happier.
Because they'd then have more grounds to attack Li Zheng.
They wouldn't mind if Liu Zi died even more miserably, they're just afraid he wouldn't die miserably enough and might live better than them.
How could Li Zheng not see through these people's mentality?
But he doesn't mind; he just does what he can and wants to do, with a clear conscience.
If others slander him, he will provide evidence to clear his name, but if they still don't believe, that's not his problem.
Believe it or not!
If they really push him to the edge, Li Zheng wouldn't mind killing a few more people, just like he did with Shinoda Chizuru, to set an example.