Is it permissible for a brother to hit his sister and curse her as an immoral woman because of her short clothing?

Your brother erred by striking you and accusing you of immorality, but his duty is to enjoin good upon you and forbid evil. You are not permitted to reject advice and persist in wrongdoing under the pretext of his misconduct or harshness. Nor is it acceptable to let your dispute with him lead you to despise religious people and prefer the morals of disbelievers; this is a dangerous statement. Your reliance on the poet's saying is invalid, for the hijab is a noble obligation that protects society and safeguards honor, and the unveiling of women is a great corruption. Your duty is to repent to Allah, abide by His limits, and strengthen your connection with your Lord by accompanying righteous women, listening to admonitions, and frequently engaging in remembrance (dhikr) and supplication (du'a).