President Luis Herrera Campins today condemned the British attack on the Falkland Islands, as did other major political figures and the press.

"Our Latin America is shaken by the aggression of an extracontinental power on Argentina," Herrera Campins said. "Faced by this situation, our position is clear. We have been, we are, and will continue to be on the side of Argentina."

Britain has violated the U.N. Resolution 502 that it proposed, Herrera Campins said, risking the peace of the continent and of the world. The Security Council resolution called for Argentina to pull its invasion force out of the Falklands.

The Christian Democratic president's denunciations were echoed by Jaime Luchinski, the presidential candidate of Democratic Action, the leading opposition party, who urged Venezuelan and Latin American solidarity with Argentina.

A British Embassy official, however, said, "There has been a very limited popular reaction, reflected to a general extent in demonstrations." The diplomat, who requested anonymity, added: "Quite frankly, I have seen more people marching in Hyde Park than in Venezuela. We are not very concerned about it."

This diplomat said there had been four demonstrations of about 50 persons each in the last four weeks in front of the embassy, plus a march through central Caracas last week that drew 1,000 persons.

There have been no demonstrations since the British landing yesterday. "We are not suffering any harassment at all," he said. If action in the Security Council is blocked by a British veto, "four or five key countries," including Venezuela, Panama, and Peru, might take bilateral action, the diplomat said.

Venezuelan Foreign Minister Jose Zambrano Velasco said yesterday that Latin American foreign ministers were contemplating a withdrawal of ambassadors from London as a prelude to a complete diplomatic break if the Falklands crisis worsens.

Venezuela has a running border dispute with neighboring Guyana that dates to the time when that country was a colony of Britain.