From everything I have read, he and his brothers always considered Canada their real home, without regard to spending a huge amount of time in Afghanistan and Pakistan.  Afghan kids don't have access to computers, or video games, or music videos.  Even though he was a millionaie, Osama bin Laden's kids didn't have access to the corrupting influence of computers, video games, or music videos.

But the Khadr kids did.  They got to visit their grandparents, in Canada -- their real home.  

Kids in Canada live a highly intellectually rich and stimulating life.  Most kids in Afghanistan live a very impoverished intellectually barren life.  So, it is hardly surprising that the time the boys spent in Canada was overwhelmingly more important to them than their life in Afghanistan.

Omar loved cars.  There is an account of how overwhelming happy he was when he got to attend the auto show at the CNE. 

It sounds to me as if he is now living in his real home.

Good luck to him and his brothers!