What is the commendable amount of jealousy, what are the situations that necessitate anger, and is leniency and lack of jealousy in some instances considered "dayouth" (a man who tolerates or condones the immoral behavior of his female relatives)?

Jealousy is a praiseworthy characteristic if it does not exceed the bounds of moderation, and it is blameworthy if it oversteps them.

The jealousy that Allah loves is jealousy in the face of suspicion and the likelihood of corruption when signs of corruption appear.

The jealousy that Allah dislikes is jealousy without suspicion, because it involves accusing Muslims of evil without justification.

Praiseworthy jealousy is the protection of women from mixing with men, and it leads to preventing situations of suspicion and closing the doors to temptation and corruption.

As for dayyoothah (cuckoldry/lack of protective jealousy), it is the absence of jealousy over one's family and mahram relatives. A dayyooth is one who condones indecency among his family.