Though the rest is true, I stand corrected on this score.
Saare Jahan Se Achchha was written by Muhammad Iqbal, not Faiz Ahmed Faiz. But both Hindustanis turned out to be turncoat Muslims.
Iqbal later rewrote the same as 'Tarana-e-Milli' which was composed in the same metre and rhyme scheme as 'Saare Jahan Se Achcha'. In it he rephrased, in an attempt to please Jinnah:
mazhab nahin sikhata apas mein bair rakhna hindi hain ham, vatan hai hindostan hamara
to
chin-o-arab hamara, hindostan hamara muslim hain ham, vatan hai sara jahan hamara.
