How did the ethnocentricity of the British and the First Australians cause conflict between the two groups?

The ethnocentricity of the British and the First Australians caused many conflicts between the two groups as they had strong beliefs that they didn't share. The British believed that the land of Australia belonged to them as Captain James Cook 'claimed' the land of Australia, not knowing that the native tribes were already living there. When the British arrived, the two cultures got along perfectly fine until the British started taking down the Aboriginals crops to grow their own food. They started to clear land for their own huts and farming area, cutting down trees that were commonly used for burial ceremonies. The Aboriginals, not able to understand the ways of the British were completely confused and started to get angry. Both cultures were not able to communicate fluently, due to the different languages spoken but they tried their best to communicate. The British could also go around killing Aboriginals for the fun of it, when they should rather be hunting for food. The actions of the British caused great confusion with the Aboriginals and for revenge, some of the British men were killed. The fighting went on and on and these actions continued to cause more conflict between the two vast cultures.