Hello, Gentlemen!
I'm Puertorican and I can tell you all that there will always be some sort of racism... here in the Island or anywhere else you choose to live. There exists racism amongst some Puertoricans... meaning light skin vs. dark skin... Like in the US! However, as GringoLoco and GreggK have perfectly stated, just treat people with respect, courtesy & kindness... Mostly everyone responds positively to that, Puertoricans or not. After all, we are human beings, too!
For the most part we are nice, happy, outspoken, hospitable people. However, like anywhere in the world we have our share of undesirable people... Just be careful who you decide to hang with.
Do not worry, no one's going to throw you off our Island, unless you do something really, really bad! LOL!
Enjoy our Island... we like to share! 