Answer:
(Fatwa: 35/35/M=1432)
It is drastic desecration and insult to tear the holy Quran and throw it. Such person ought to do tauba and istighfar. You should make him understand and get him treated if he is mentally challenged.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
