It seems that two issues were being addressed. From the website posted in the quote:
"The platform of the party drew nationwide astonishment just a day earlier when it removed a reference to God and a declaration that Jerusalem is Israel’s capital.
The amendment, proposed by former Gov. Ted Strickland, chief of the platform committee, restored the notation that Americans were encouraged to reach their “God-given potential.”
It also recognized Jerusalem as the capital of Israel.
Strickland didn’t offer an explanation for why God and Jerusalem were removed, explaining only that “our belief in God is central to our American story” and “the president recognizes Jerusalem as the capital of Israel and our party’s platform should as well.”
However, Obama’s position on Jerusalem as the capital of Israel has been a point of contention. White House spokesman Jay Carney pointedly refused to state that Jerusalem is Israel’s capital when confronted by White House reporters, including WND’s Les Kinsolving."
Based upon this information, it is possible that some were booing mention of God and some were booing the suggestion that Jerusalem be suggested as the capitol of Israel and, perhaps, some objected to both.