GUJRAT, Pakistan — Muslim extremists shot at and beat dozens of Christians Sept. 23, including one cleared of “blasphemy” charges, in Punjab province’s Gujrat district, Christian leaders said. The attack on Tariq Gill, exonerated of charges of blaspheming the Quran on Sept. 3, 2009; his father, Murad Gill; his mother; and the other Christian residents was the latest of more…