If someone intelligent wants to blow up your flight I bet they can. It's just most terrorist are very stupid, hence why they become indoctrinated into believing crazy lies about what the Quran (or for that matter the bible) says.
Terror groups have plenty of well-educated folks and highly skilled bomb makers. They don't send them out on suicide missions, but they're certainly there.
The ones that design the the bombs are typically not the ones that blow up the bombs, or assemble the bombs.