Life / Is the word "Polack"rascist? [185]

I thought it could be racist but two of my polish friends told me it was what a person from Poland was called. I made the mistake of saying "polska" when refering to the language and he told me that it was the country and the language was "polski", so I called him a "polski" thinking with the the whole gender specific thing (ending in a = feminine, i = masculine) and he told me it was polack for a person.