“But as for them their way is not equal (fairly weighed). When the righteous turns from his righteousness and commits iniquity, he will even die in it. And when the wicked turns from his wickedness and does what is lawful and right, he will by that live. Yet you say ‘the way of the Lord is not equal'. O house of Israel, I will judge you every one after his ways.”
God points out that it is their way that is not just, not His. He treats all the same. If their heart are responsive towards Him and they seek His mercy, He gives them life. If their hearts are turned away from Him and they do not seek His mercy, He gives them death. And if they turn again He again gives life. He is the same towards all. All will be judged according to their present ways and not according to some supposed merit which does not exist. They want to insist that there are some who deserve more than others, and therefore deserve different treatment on those grounds. But God treats all men equally.