The problem that arises now, usually refers to two things. First they didn't learn the science of religion, and secondly they learned, but wrong and one of the teachers or not learned at all.
First, he did not learn the science of religion.
Indeed, the enemy will not be able to castigate an stupid as the stupid hurt himself. Ignorance is death for the ignorant. Their bodies like a tomb that housed the souls who do not know God.
Second, he was learning, but incorrect and false teachers or not learned at all.
It is more severe. So many people are currently studying in the internet, and social media. There, an awful lot of hoax news that spread. In fact, the Prophet tell "enough someone is a liar, just by hearing something, then pass it on without regard to right or wrong, then he is a liar."