Rav Anan says we can eat from a renegade's shechitah. His proof is that Yehoshaphat ate from Ahab's shechitah. It seems that this is not a reasonable proof. It could be that Ahab's shechitah despite his idolatrous ways was okay to eat because of the strong pull idolatry had before the Rabbis eliminated it (when they simultaneously eliminated prophecy). But in Rav Anan's time, when the pull is much less,and we are more able to resist it, eating from a renegade's shechitah is not valid. How could he give an overriding rule re an idolater's shechitah when the scenarios were not comparable?
Barry Epstein, Dallas, USA
The invalidation of the Shechitah of a Mumar is not a punishment to the Mumar, but rather it is due to the the Mumar's intent at the time that he does the Shechitah. Therefore, it is irrelevant whether the "devil made him do it" or not.
D. Zupnik