What is the ruling on assaulting a Muslim with beating and weapons on an unsubstantiated accusation of theft, and what is the ruling on one who condones that?

The actions of these individuals are forbidden (haram). Islamic law prohibits accusing a Muslim of evil and assaulting their life, property, and honor, based on the Almighty's saying: "O you who have believed, avoid much [negative] assumption. Indeed, some assumption is sin." And based on the Prophet's (peace be upon him) saying: "Indeed, your blood, your properties, your honor, and your skins are sacred to one another." And his saying: "A Muslim is the brother of a Muslim; he does not wrong him, nor does he abandon him, nor does he despise him... All of a Muslim is sacred to another Muslim: his blood, his property, and his honor." It is also established that the Messenger of Allah (peace be upon him) forbade terrifying a Muslim and brandishing a weapon in their face without a legitimate Shar'i right, and he threatened those who do so with expulsion from the mercy of Allah the Almighty, based on his (peace be upon him) saying: "Whoever points a piece of iron at his brother, the angels curse him until he stops," and his saying: "It is not permissible for a Muslim to frighten another Muslim." It is not permissible for others to condone their actions. The obligation is to support the oppressed and forbid the wrongdoers from evil.