He denied the request of international middlemen. Finally he managed to overthrow Pahlavi dynasty and end 2500 years of monarchy in Iran on 11 February 1979.
Imam neither compromised with Bakhtiar nor any other agent of the regime and he always was after overthrowing the monarchs. His purpose was to initiate a revolution and didn't accept to take any steps back or even to stop for a little while. He believed that when a system is against Islam, its culture, its army, its economy and its politics, it must be changed, and power must be transferred to an Islamic system.
He was against reformations and stood up against the authority of regime. He believed that the repentance of Shah was as fake as Pharaoh's. He refused the offer of free election and said it was meaningless in the presence of Shah.
He knew that arresting the authorities was just a game, and thought of Sharif Emami's government, known as the "national reconciliation" as a betrayal to Islam. No one had the firm purpose of overthrowing Pahlavi dynasty more than Imam Khomeini. No one else believed it was possible.
So they went to Imam many times to discourage him. He always told them not to fear from the United States. Responding to the ones asking him to go "step by step", he said that they would break your legs before you take your second step.
On the days leading to the revolution, a deputy from French government and Carter went to visit Imam in Paris, asking him to give some time to Bakhtiar's government, and also threatened him about staging a coup. He responded "Bakhtiar's government is illegal and assuming that I would do such thing, our nation will never accept it".
He also declared that if a military coup happens, he will declare Jihad. He believed accepting any of these condition meant as if they had joined Shah. Amini, a deputy from Shah, who didn't make it to visit Imam in Paris, told Shah that the Ayatollah was irreconcible. He also told the US ambassador that Ayatollah Khomeini would never compromise and will keep fighting until Shah's resignation.
When Shah left Iran, Bakhtiar and the Americans thought that the main interferer between them and Imam was gone. Bakhtiar had come to the office to get along with the adversaries of the government. But the only thing Imam accepted after Shah left Iran, was their resignation.
Seyyed Jalal Tehrani, the President of Council of Monarchy, resigned and Imam accepted to meet him. But Bakhtiar didn't do so. Instead he kept sending middlemen to convince Imam to meet him. But Imam refused. He announced that Bakhtiar's position was illegal and people had to be aware of the collusions. Brzezinski, advisor of Carter, confessed that US strategies towards Iran were doomed to failure and Imam Khomeini was an irreconcilable man.
The irreconcilableness and decisiveness of Imam never was interpreted as tactlessness, and everyone knew it was the result of his awareness about the enemies, his political foresight and his fidelity to perform his duties.
After the Air Force officers joined Imam on 8 February 1979, the military chiefs knew that the victory of Islamic revolution was definitive. The last stroke to regime was when the military chief neutralized. A few hours later, Imam's deputy announced on the radio: "This is Tehran, the true voice of Iran, the voice of revolution"
After 15 years of constant efforts of Imam Khomeini, the nation finally gained victory.
Source: The article was originally published on https://irdc.ir/en/ website