>>111392765There's like a bunch of easy objections.
First, he didn't even know Fantasio at that time, how was he gonna know the evil guy would turn out to be Zantafio? Second, Vertignasse reassured him the prediction was a load of bollocks so naturally he wouldn't trust it. Third, why would he remember the prediction after all those years? Fourth, Spirou doesn't kill. Like, at all. That's one of his things and hes does it in better faith than Batman. Fifth, as mentioned earlier, those stories are supposedly retold by the older spirou as unreliable memories, so he could have adjusted that and back then the seer didn't actually mention Zantafio, jut an evil man.