I think if they commit the crime they should be treated as everyone else who commits the same crime is treated. That is to say, if a non-Jew is given community service and/or probation, so should a Jew (especially one who looks like a religious Jew). If the non-Jew is sent to prison, so should the Jew. Don’t do the crime.
Personally, I believe BOTH should be thrown in jail, depending on the crime, though I also believe in mitigating circumstances, and a non-violent offender should not be put into prison in a violent population. The reality is that we Yidden are held to a higher standard by the justice system, and Jews are typically punished FAR worse than non-Jews committing the same type of crime. Look at the Walkers and Jonathan Pollard.
I don’t say that the Jewish criminal should get off scot-free, but if two people Jew and non-Jew commit a bank fraud or medicaid fraud, their religious beliefs (or lack thereof) should not determine who gets a harsher punishment. They are both guilty. Yet, usually, the Jew will be treated more punitively.