Yeahhhh...but...well, the question of his kith isn't even the main thing they started talking about. His reaction makes sense on the spectrum of what-sidhe-kin-might-do, but it's to the more extreme end. More critically now, though, is his risk of self-harm (wanting to lose the sight) and the simultaneous fading of a bonded chimera. Whether or not it's a reasonable reaction from him, the question is what the heck to do about it.