The most wrong people are the ones who think there is only one way to measure wrongness.
That a person chooses to take an action tends to show that they feel they are right from their own perspective.
The only way to objectively judge is to establish a set of values, and the judgement you get from that is always based on that set of values (and what circumstances you choose to include).
Since almost no real person in a real situation has the exact same sets of values for everything, and since they have different perspectives and different knowledge, there tend to be many disagreements about what’s right or wrong.
But it is a higher level of error to not acknowledge that people have different sets of values and different perspectives, and to think there’s one answer to who’s right, who’s wrong, or who’s more wrong, in any absolute sense.