The New York Times has an article here.
I love this:
In explaining his endorsement, Mr. Robertson said he was confident that Mr. Giuliani would defend the country against “the blood lust of Islamic terrorists.”
Mr. Robertson argued that judicial appointments were the crucial battleground for Christian conservatives and said Mr. Giuliani had pledged to appoint conservative jurists.
People close to Mr. Robertson said he also worried that an evangelical revolt against the Republican Party over its nominee could deliver the White House to a Democrat or even split the Christian conservative leadership from its base.
Yep. Robertson is backing Giuliani out of political expediency, nothing more. If I were a NYT editor the headline would have read “Conservative nutjob endorses twice divorced adulterer.”