Let us consider his behaviour in the case of the city of Thebe, and read together Wikipedia https://en.wikipedia.org/wiki/Battle_of_Thebes
"The Battle of Thebes was a battle that took place between Alexander the Great and the Greek city state of Thebes in 335 BC. After being made hegemon of the League of Corinth, Alexander had marched to the north to deal with revolts in Illyria and Thrace, which forced him to draw heavily from the troops in Macedonia that was maintaining pressure on the Greek city-states of the south to keep them in subjection. Although Alexander did not desire to destroy Thebes, after sending several embassies requesting their submission on what he considered merciful terms, he eventually decided to destroy the city as an example to others."
How mercyfull Alexander was!"The Thebans made everything ready to fight to the last man, and put their women and children in the city temples.[1] They were aware that there was to be no quarter. Once the siege began, the Thebans fought desperately, fearing for their homes, wives and children. The battle went on for some time, and it was in doubt. However, Alexander sent in his reserves and the situation started to improve. Despite the Theban's valiant struggle, however, Alexander noticed that a unit of their guard had abandoned one of the gates. It is here that he sent Perdiccas troops to enter and penetrate into the city itself.[1] At this point, realizing that the fight for the city walls was a lost cause, the Thebans retreated and began their final battle within the city itself. It was around this time that Philotas and his garrison broke out of the citadel and began fighting in the battle as well.[1]
Alexander punished the Thebans severely for their rebellion. Wishing to send a message to the other Greek states, he had the 30,000 Thebans not killed in the fighting sold into slavery. The city itself was burnt to the ground, with the exception only of the house of Pindar, which Alexander ordered be left intact out of gratitude for Pindar's verses praising Alexander's ancestor, Alexander I of Macedon.[6] "
This is one of the episodes of Sikandar the Destroyer.
