What is ironic about the timing of Julius Caesars murder(in relation to the proceeding events)?

One of the major events preceding Caesar's assassination was the civil war against Pompey, which had totally thrown the balance of power in the Senate off. The real intention of the Will of Caesar was to make reforms to improve life in Rome by freeing the citizens from the greed & injustices of the Senate aristocrats, but, of course, the aristocrats didn't see it that way. They, along with the Republicans, saw Caesar's absolute control over religion, politics and the military as being King-like, and feared that he desired to become King. The absolute thing they all feared the most was having the monarchy, which had been replaced way back in 510 BC, be restored by Caesar.

The irony of his assassination is that the efforts of the Liberators to save the Republic from the totally nonexistent threat of monarchy ultimately led Rome into becoming an empire, ruled by one supreme sovereign. Ie, they were so afraid of being ruled by just one person that they murdered Caesar, and yet they ended up being ruled by just one person anyway. They murdered one of the most brilliant, powerful and noble leaders Rome ever had just because of their own ambition, fear and rebellion, and they ended up achieving nothing from doing so.