The Roman Senators disliked Caesar because they thought he would be a threat to their positions once he becomes the king.
Explanation:
As Rome is a republic country, the senators were the rulers of the country, they were given the authority over the people. However, The Roman Senators disliked Caesar because they thought he would be a threat to their positions once he becomes the king.
There were three reasons:
Though they wanted to kill him and demolish the republic, it ended up to civil war as well as their death.