Answer:
J.P. Morgan, in full John Pierpont Morgan, (born April 17, 1837, Hartford, Connecticut, U.S.—died March 31, 1913, Rome, Italy), American financier and industrial organizer, one of the world's foremost financial figures during the two pre-World War I decades.
He Was Just Attending The Play Our American Cousin At Ford Theatre In Washington
He means even though the Greasers and the Socs live very different lives the Greasers can still see the same sunset as the West Side rich kids (Socs) despite their physical and interior differences.