Sam Harris had a terrific overview of this same thing years ago...you can find it on youtube
basically if a man robs and kills a few rich families and says "i did it because i wanted the money and i wanted to steal their shit" liberals take that at face value and don't look for any deeper societal or religious reasons to explain his behavior. He wanted some shit and other people had it...killed them, took it.
but when a muslim says he wants to follow the word of Muhammad and the Quran by becoming a martyr to take his promised place of paradise in heaven a liberal pushes that notion aside and figures out how gun control would have prevented this attack.
as with many religions Islam condemns homosexuality but goes even further by endorsing their execution. Last night's shooter really believed he was doing Muhammad's work and is now in paradise while Liberals in their infinite demagoguery, will overlook the obvious and blame gun laws