Why did the senate assassinate Cesar?

Julius Caesar was assassinated by a group of senators on March 15, 44 BCE, primarily because they feared he was accumulating too much power and threatening the Roman Republic's democratic principles. His recent appointment as dictator perpetuo (dictator for life) alarmed many senators, who believed he aimed to establish a monarchy. The conspirators, led by Brutus and Cassius, hoped that by killing Caesar, they could restore the Republic and prevent tyranny. However, the assassination ultimately led to further political instability and the rise of imperial rule.