I also want to point out something else. Rav Yerucham in Daas Torah in Bamidbar, page 138, brings down from the Ramchal that the Ribbono Shel Olam doesn’t “do” evil, he was just “borei ra.” So I think you aren’t supposed to say that the RBSO killed Leiby, like Rabbi Twerski said, even if you hold that a baal bechira can’t kill someone who isn’t chayav meesa. It would be a chutzpah to speak like that about the RBSO.