So in looking at the wicked within Israel it is important to continue reading the text. If you read on down to verse 16 you will see that these verses actually support and uphold the text of Romans 3 that specifically state there is none righteous - no not one! Any honest Jew hearing this warning from Ezekial would be absolutely horrified - simply because every righteous man will eventually sin - sooner or later. The whole tenat of the passage can be summed up in verse 12 - Therefore, son of man, say to your countrymen, 'The righteousness of the righteous man will not save him when he disobeys, and the wickedness of the wicked man will not cause him to fall when he turns from it. The righteous man, if he sins, will not be allowed to live because of his former righteousness.
If there is any doubt where Ezekial stood on the issue of regeneration and God's sole action in salvation one only need to flip over a couple chapters to chapter 36 and read verses 26 and 27: I will give you a new heart and put a new spirit in you; I will remove from you your heart of stone and give you a heart of flesh. And I will put my Spirit in you and move you to follow my decrees and be careful to keep my laws.
Doesn't look much like the folks being talked about in this passage had much to do with the process at all.