There is the well-known phrase, ‘One man’s food is another man’s poison’.
What one person thinks is good, another may think is bad.
The problem arises when we think, for example, that something is good, and then we start thinking that is the fundamental reality, that everyone else should also think this is good.
If anyone disagrees with us we would think they are wrong and bad. We can lose out peace and go into a conflict with them about it.
However, what we should consider is that we have simply defined it as good and bad based on the habits of our mind, our own imagination.
If we can accept that other people think differently based on their own habits in the mind, then we won’t let our mind become too judgemental and lose control of itself. We can keep ourselves intact and remain at peace. In meditation, we do not make any judgement of what appears. Then the mind can recede and become quiet.