I'd hope they work but I've seen too many "former" nazis get criticized for still holding some terrible views then immediately throw a tantrum and run back to the far-right because they don't actually want to take accountability they want to get coddled by the same minorities they hurt and be told how clever and brave they are for no longer being bigots.
Yes, because the ultimately didn't get rid of the root of the problem and so they go back to their ways. Very similar to how a person who doesn't do rehab correctly or had a bad experience with it will go back to using drugs when things get hard because that's their coping mechanism.
They need to have better coping mechanisms.
The exit program in Germany for example has a 3% recidivism rate. Not too bad.