Over the decade from 2007 to 2017, government restrictions on religion – laws, policies and actions by state officials that restrict religious beliefs and practices – increased markedly around the world. And social hostilities involving religion – including violence and harassment by private individuals, organizations or groups – also have risen since 2007, the year Pew Research Center began tracking the issue....
It is a cause because the effect is America entering the World War. They "found" the Zimmerman Note and got "angry" because they were teaming up as an alliance against America.
