What is the authenticity of the narration mentioned about the Children of Israel, and is the intent behind their "eating and drinking with them" their companionship during sin? What are the sins intended? And what is the meaning of "striking the hearts of some of them with others"? Does this necessitate abandoning wicked relatives and disbelieving parents?

The presence of your companion engaging in forbidden acts does not prevent you from eating with him, sharing with him, or sitting with him, unless there is harm in doing so. In such a case, you should deal with him cautiously without being overly familiar. Furthermore, the meaning of "Allah strikes some of them with others in their hearts" (an approximate translation, as the exact Arabic phrase "ضرب الله قلوب بعضهم ببعض" carries a nuanced meaning of hearts being intermingled or blackened due to sins) refers to their mingling or the blackness of their hearts due to sins. It is permissible to befriend a transgressor for a worldly reason, not for his religiosity, while detesting his sin. One must despise a transgressor to the extent of his transgression, for hating people of disobedience is a fundamental principle in religion. A believer does not befriend one who opposes Allah and His Messenger. This verse also includes disobedient believers.

As for ostracism (hijr), one must first advise transgressors and remind them. If advice does not work, a distinction must be made between parents and others. It is not permissible to ostracize parents, no matter what they do. As for others, if it is possible to maintain contact with them without being influenced by them and to preach to them with wisdom, then this is better than ostracism, and there is no harm in sitting with them while continuously denouncing their actions. Ostracism varies depending on the one who ostracizes and their strength, as its purpose is to deter the ostracized person. The Prophet, peace and blessings be upon him, ostracized some of his companions and turned away from others according to what was expedient. In conclusion, ostracism is determined by what serves the Shariah's interest, as the Prophet, peace and blessings be upon him, ostracized some people but not others.