Pope Francis has spoken out against the tightening of immigration laws and called for a “global management of migration” based on humanitarian principles. The pope, in his weekly general audience on Wednesday, also said human smugglers must be stopped. The head of the Catholic Church has repeatedly expressed his sorrow over the many people forced to flee their homes either due to violence or extremely poor living conditions. “The Mediterranean has become a cemetery,” said the pontiff. Most of these deaths could have been prevented, he said. But getting migration under control through tougher l…