[Ughhhh he totally dug his own grave on this one didn't he. Charles sighs quietly before trying to figure out how best to explain this.]

Neither one of us wants to disagree with the other, we just have very different opinions on how to move forward. [And maybe he'd hesitate to explain this, and he's pretty sure Arthur won't have the full details on it anyway, unless he's been catching up on his world history, but it wasn't like Erik had been quiet about it, recently.] Erik's already lived through humanity at its cruelest and most intolerant, and he doesn't want to see that happen again.