Complex sentence: Some felt that Anthony Hopkins should not have played Richard Nixon in "Nixon" because of a lack of resemblance between the two and some Selena fans objected to the casting of Jennifer Lopez in a biopic about her because Lopez is Puerto Rican and Selena was Mexican.
Split into simpler sentences: Some felt that Anthony Hopkins should not have played Richard Nixon in "Nixon" because of a lack of resemblance between the two. Also, some Selena fans objected to the casting of Jennifer Lopez in a biopic about her because Lopez is Puerto Rican and Selena was Mexican.