Like most parables, the fairness one can be applied in different ways. The point it's making is that changing the numbers in a lie doesn't stop it being a lie.

There are a lot of numbers thrown about in the stories about how things got to the state they are now in the Holy Land - numbers like the estimated number of people living in Palestine back in the 1920s, and the number of refugees who fled their homes in 1948, and the numbers who left "voluntarily", and the numbers of civilians killed on both sides over the last few years.

The numbers argued up and down and round and round. But in the last resort, they aren't important.