why is this the top comment
because a lot of people agree, duh.
I partially agree. a large majority of muslims are radicals/zealous/die-hards/whatever adjective for "truly faithful", and a good chunk of those zealots are extremists who take drastic action to achieve their goals, also known as terrorists.
Islam is far from an "outdated religion" though, it's literally the "youngest" major religion out there. the beliefs are outdated relative to western societies, however.