Despite the disclaimer, I suspect you know that statement isn't true. Sheinbeins murderer wasn't extradited because he would have faced the death penalty in the US. Dozens of countries from Europe to South/Central America to our neighbor to the south have the same policy. He was tried in Israel, where he got a much lighter sentence than he would have in the US. Israeli Nationals at the time of the commission of the crime (not Jews) aren't extradited, also a policy followed by dozens of countries.
Actually I think the most legitimate indictment in this context would be against Yasser Arafat, who ordered the murder of two American diplomats in the 1970s.