The story of Yehuda and Tamar is complex, with several morally ambiguous aspects. However, there are a few key reasons why Yehuda's actions with Tamar were considered problematic:

1. Deception and mistaken identity: Yehuda did not knowingly engage with Tamar. She disguised herself as a prostitute, and he was unaware of her true identity12. This lack of informed consent is ethically questionable.

2. Failure to fulfill familial obligations: Yehuda had promised to give his youngest son Shelah to Tamar in marriage, following the deaths of his older two sons. However, he failed to keep this promise, leaving Tamar in a vulnerable position as a childless widow45.

3. Hypocrisy: When Yehuda learned of Tamar's pregnancy, he quickly condemned her to death, not realizing he was the father. This demonstrates a double standard in his moral judgment7.

4. Inappropriate sexual conduct: While some sources argue that relationships with prostitutes were not strictly forbidden at that time8, Yehuda's behavior still fell short of the moral standards expected of a patriarch.

5. Abuse of power: As Tamar's father-in-law and a tribal leader, Yehuda held a position of authority over her. His actions could be seen as an abuse of this power dynamic9.

It's worth noting that the story concludes with Yehuda acknowledging his wrongdoing. When confronted with evidence of his involvement, he states, "She is more righteous than I"110. This admission suggests a recognition of his moral failings in the situation.

The rabbinical tradition often interprets this story as a turning point for Yehuda, leading to his growth as a leader and his eventual role in securing the future of the Jewish people6. Nevertheless, his initial actions with Tamar are generally viewed as ethically problematic within the context of the narrative.