He knew about Syria, he didn't immediately associate the word Aleppo with the Syrian situation. He just finished discussing Nader in 2000, the next question could have been about anything and parsing all your knowledge is not an easy task.
I care more about the crimes committed than whether the justice system decides to prosecute.
Not knowing Syria is a huge problem for an incoming president.
Having a warrant out is not something that I would take lightly in someone who aims to be commander-in-chief.