How does "The Tempest" show that too much power can have dangerous consequences?

Certainly power and colonization are themes which address your question. Check this out:

https://www.thoughtco.com/the-tempest-power-relationships-2985283#:~:text=In%20The%20Tempest%2C%20power%20and,enslaves%20and%20treats%20Caliban%20badly.