I plan on including part of a nazi uniform for my content.
What is your reason for wanting to include a part of a nazi uniform?
This part of the uniform represents evil and I want to showcase that
If you used the a real Nazi uniform to show as a evil side that would bring the authenticity to your play. Go ahead and use it.
I was going to see what would happen if I used just a part of the uniform. I will consider it
Using some Nazi memorabilia in a play may hurt people who don't want to see symbolism from the holocaust. It's probably for the best to just keep the historical pieces somewhere where no one can see, or sell them to somebody that would have a better use for them.