I'm going to call people monkeys
Do you really think the people are monkeys?
Yes I actually think that they're monkeys for real.
It is wrong to call people offensive names when they can misinterpret them wrong. People might physically attack you if you say it to the wrong person.
Seriously you need to get over this Hitler thing, who are you?
Calling people names for no reason is very offensive. Calling someone a monkey is often used as a racial slur to black people, so be careful with your use of this word. Try to simply refer to the animal as a monkey instead of a human to stay out of trouble.