Scriptures, what they were hiding

And when they come to you, they say, "We believe." But they have entered with disbelief [in their hearts], and they have certainly left with it. And Allāh is most knowing of what they were concealing.

And you see many of them hastening into sin and aggression and the devouring of [what is] unlawful. How wretched is what they have been doing.

Why do the rabbis and religious scholars not forbid them from saying what is sinful and devouring what is unlawful? How wretched is what they have been practicing.