Truly pathetic.
Dawn was just reporting on the BJP’s propaganda. I’m sure even you’re aware how those claims have been completely discredited, because the 2001 census included data from Jammu & Kashmir, while the 1991 census did not. Once the data is adjusted for J&K, the growth rate declines to 29%…and you see that the rate of population growth is actually declining faster among the Muslim community than among the Hindus:
Muslim growth rate: myth and reality, The Milli Gazette, Vol.5 No.19, MG113 (1-15 Oct 04)
As ravage has already pointed out, this means absolutely nothing in terms of polygamy prevalence.