The people...
The people, at that time were not only idol-worshippers but they were also worshipping the stars, the sun, the moon etc. All the time, he was making them realise their error in their choice of 'gods'. He was showing his people what they called a god, did not deserve to be called god and worshipped if it disappeared at times. So Prophet Ibrahim started preaching the belief of One God and persuading his people not to worship anything else but Allah, the one and only God.
Once, it was the time of annual festival in the town and according to their custom, Namrud, the King, went out of town with all his people to celebrate the day. Prophet Ibrahim did not accompany them but stayed behind. He went to the temple where all the idols were kept, and broke all of them one by one. He left the biggest idol untouched, but put the axe on its shoulder. When the King and his people returned they were very angry to see their idols destroyed.
He said that he would kill the person who had caused that damage. The people told him that it must be a young man, named Ibrahim who always preached against the worship of idols. He must have destroyed them. When Prophet Ibrahim was asked if it was he who broke the idols. He replied, “Why do you not ask the chief (of the idols) who is standing safe.
Perhaps he has done it, that is if your idol gods can speak, ask them as to who broke them.” Thus Prophet Ibrahim did not utter a lie denying what he had done. He only wanted the people to first ask their own idols as to who had done it? Namrud got very angry and asked his people their opinion. Every one suggested that Prophet Ibrahim be punished by burning him alive in a big fire.
So, Prophet Ibrahim was jailed, while Namrud ordered that all available firewood in the forest be collected and be heaped up in one open place. When this was done, it was set alight. The fire burnt fiercely and widely for days and days. It had generated so much heat that no bird dared to fly nearby. At the appointed day on which Prophet Ibrahim was to be put in the fire and burnt, Namrud with his large army and followers came out to that place to watch.
On seeing the huge fire and the intense heat, he began to ponder as to how it would be possible to convey Prophet Ibrahim into the fire. Suddenly Satan, the devil, came and suggested that a type of a crane be prepared which could be used to hurl Prophet Ibrahim into the fire.