The answer is simply have an immediate freedom of repeal and which Brutus is saying as he would have freedom to due killing Caesar
We don’t have any background information to answer your question, sorry.
This is true. Fair use enables people to parody or criticize a work without being accused of infringing a copyright. You can also use it for research properties or during education and it will fall in the same category. However, when parodying, the people who parody often seek permission from the original creator even though they don't need it just a sign of good will.