Since Marjane comes from a politically active family (her parents demonstrated several times in
Persepolis), Markus’s outlook is unacceptable to her. Markus’s outlook stems from his own privilege—he seems to believe that even if things are getting worse in Austria, it’s not going to affect him much or at all. Since Marjane is a foreigner, though, she’ll become a target of any nationalist or racist policies. In short, Markus and Marjane grow apart because Markus won’t acknowledge how Marjane might suffer in Austria.