And once again I'd like to remind we're talking about the guy that mindwiped Cyclops because the latter was sad (and he look bad) and a guy that spent some issues trying to kill Emma for something she wasn't even involved in anymore less than 3 years ago. Not to mention Moira it's been at it for thousands of years and thinks it's her last chance. Mindwipe Emma, even kill her off (considering they can resurrect her later, without the memory), it's very much in character.