When I was about 14 I thought Endermen were so cool and I'd give them tragic Greek backstories and I wanted to be their friend so bad. They're just existing. They don't like eye contact. They hold blocks just because they can and destroy public property like the god intended. They get overwhelmed and rampage out of their control and probably wonder why there's blood on their hands.
Edit: This was my first stimboard post and is a bit old, bad, and did not have linked credit to the GIFs used. I sincerely apologize to the GIF creators and recommend you check out my newer stimboard as they are of higher quality and include credits.