Not every Muslim is bad. Those who are bad need to be good. The question is how to be a good Muslim.
The absolute end of a Muslim lies in discernment. That commands to make distinction and choose the good from bad, genuine from counterfeit, right from wrong.
Muslims have had access to verses 23:53, 6:159, 42:13 since ages. But not making use of them as part of their instinct are the same as if they were not revealed to them. The Book of verses demand that human life must be a life of becoming from the life of being since it never truly is anything at all for them.
Being people of the Book isn’t all. The actual gift is an Applied Quran.