By Andrew Chung WASHINGTON (Reuters) -The U.S. Supreme Court further reduced the separation of church and state in a ruling on Tuesday endorsing more public funding of religious entities as its conservative justices sided with two Christian families who challenged a Maine tuition assistance program that excluded private religious schools. In the latest in a series of decisions in recent years expanding religious rights, the justices overturned a lower court ruling that had rejected the families’ claims of religious discrimination in violation of the U.S. Constitution, including the First Amend…