Is hijaab a farz?

Well thanks for agreeing with* something*...lol

“Yūsuf ibn Khālid As-Simtī told Abū Hanifah that he was a kāfir for saying witr was wājib, thinking by that he meant it was the same as fardh. Abu Hanīfah stated, “You can’t scare me with your takfīr, since I know that the difference between Fardh and Wājib is like the difference between the heavens and the earth **(al farq bayn al wājib wal-fard**h ka farq mā bayn as-samā’ wal-ardh).”
[Tāj 5:66, and Badā’i` - Beirut: Dār Al Kitāb Al-‘Arabi, 1402/1982 print pages 1:271]

No it's not only the "mushrik" and "bidati" sufi ashari scholars....you will find many people who find faults in their translation.

may Allah help us.