Source: New York Post By Isabel Vincent and Chris Perez The historic Manhattan cathedral that was gutted in a massive fire was one of four Christian Orthodox churches to go up in flames on Orthodox Easter Sunday — sparking fears of a coordinated attack on the religion. While FDNY officials said the blaze at the Serbian Orthodox Cathedral of St. Sava on West 25th Street does not appear suspicious, members of the Orthodox community have doubts. They are worried that the blaze — along with church fires in Australia and Russia — were set in retaliation for the religion’s role…