U.S. President Barack Obama is anti-Israel and “is willing to throw Israel under the bus in order to please Muslim nations,” former New York City Mayor Ed Koch charged.

Koch, a Jewish Democrat, has been gradually “falling out of love” with President Obama, a term he used in a commentary he published last August. The recent snub by the president of Prime Minister Binyamin Netanyahu, highlighted by a meeting without a press conference or even an official photograph, broke the proverbial camel’s back for Koch.

After having opposed President Obama’s health care reform plan and expressing disappointment over his failure to convince Russia and China to back harsh sanctions against Iran, the former mayor recently wrote, “President Obama’s abysmal attitude toward the State of Israel and his humiliating treatment of Prime Minister Netanyahu is shocking.”

He then went one step further with unprecedented public criticism of President Obama by a leading Democrat, telling Fox News that the country’s leader is more interested in pacifying Muslim nations than helping Israel.

“What they did is they wanted to make Israel into a pariah,” he said. “It’s outrageous in my judgment,” Koch commented.

“I have been a supporter of President Obama and went to Florida for him, urged Jews all over the country to vote for him, saying that he would be just as good as John McCain on the security of Israel. I don’t think it’s true anymore.”

He also publicly questioned New York Senator Chuck Schumer, a Jew, for not protesting President Obama’s treatment of Israel. “It’s their silence,” Koch told the New York Post’s Michael Goodwin. “I can’t figure out where they are.”

The senator reportedly told Koch he will openly side with Israel if President Obama does not back off.