In your own view, is it possible to be at peace with everyone?
Is it even possible to never have a negative thought about others or once self?
If yes, how?
If no, why?
Yes, the enlightened sage can be at peace with everyone, and can convert even diabolical beings into angels with his very presence.
There are stories of ashrams in India inhabited by enlightened sages both in the past and present. In the vicinity of these ashrams extending to a certain radius, it has been found that even predator animals exhibiting a nonviolent nature. People walking in these areas are found to have good thoughts and performing good actions spontaneously.
This is because of the positive energies and vibes in these areas which have been consolidated for a long time, exerting an influence on other beings.
In my own region, there is a nearby village where a female enlightened master lived for a period of time in the previous century. An interesting fact of this village is that the crime rate is pretty low along with lesser incidents of natural disasters and greater overall prosperity, compared to other villages around. There is a lot of positive vibes in this region, which made it a tourist destination of sorts in recent years.