HAVANA, Aug 2 (Reuters) - The United States doubled down on its tough stance and sanctions on Cuba after historic protests in the Communist-run island last month and said it would seek to support protesters.

Yet only 20 foreign ministers worldwide joined in signing the letter, signalling how relatively isolated Washington is on its Cuba policy, analysts said.

These regional divisions came to the fore last week when the Organization of American States had to postpone a meeting on the human rights situation in Cuba due to objections by more than a dozen member states.

He also said he thought Biden must make a decision about the embargo against Cuba given that "almost all countries of the world" are against it, while Fernandez said it was up to no other country to decide what Cubans should do.

"We appreciate countries that defended the Latin American and Caribbean dignity," said Cuban Foreign Minister Bruno Rodriguez, who has accused U.S.-backed counterrevolutionaries of being behind the protests following years of open U.S.

State Department spokesperson said it was "deeply disappointed" the OAS meeting did not take place, adding: "The people of the Americas have a right to hear from the Inter-American Commission on Human rights about the situation in Cuba".

"We will continue to work within the OAS to press for democracy and human rights in Cuba and throughout the Americas and are confident this informational meeting will indeed take place in the coming days.".

The OAS General Secretariat declined to comment while the State Department spokesperson said "Almagro’s leadership in supporting democracy and respect for human rights in the Americas" had returned the OAS to its original purpose