Why are Cubans able to apply for citizenship just a year after they arrived to the us?

When to people from most other nationalities if takes many more years?

I'm actually just curious like, I thought the US and Cuba didn't get along why allow so many of their people in your country with so little requirements when it's much more difficult for people from other nations you're supposed to be in friendly terms with?

Is that why there's so many Cubans in FL?