It is really remarkable how many people call themselves Christian, but do not appear to have any sense of morality or fair play.
It is not "charity", dumbass. They are U.S. citizens, who have been required and expected to serve in the U.S. military throughout all the wars we fought over the last century. Puerto Ricans have fought, bled, and died for the stars and stripes. Did you pick up a rifle and serve anywhere??
If you genuinely think they need to pay more taxes, then you would be the first one advocating giving them the statehood they have been denied for a century....and that includes giving them two new U.S. Senators. That assumes your concern trolling about their taxes is actually genuine and principled.