Popeye and Bluto became enemies because the two are rivals for Olive Oyl's affections .
Bluto is the main antagonist in the Popeye cartoons .
Bluto .
The cartoon Bluto was created by E.C. Segar in 1932. Bluto is attracted to Olive Oyl as is Popeye and Bluto often attempts to kidnap her. Popeye uses spinach and usually ends up defeating Bluto.
Bluto's girlfriend is Olive Oyl. She is a central character in the Popeye comic strip and animated series, often caught in a love triangle between Bluto and Popeye. Olive is portrayed as a slender, charismatic woman who typically favors Popeye despite Bluto's advances.
Bluto/Brutus .
Bluto
"Bluto" is Popeye's rival for Olive Oyl's affections .
Popeye's enemy is typically portrayed as Bluto (also known as Brutus), a large and brutish sailor who constantly vies for the affections of Olive Oyl and tries to best Popeye in various competitions. Bluto serves as a recurring antagonist in the Popeye cartoons and comics.
Bluto (also known as Brutus) .
http://en.wikipedia.org/wiki/Bluto
Bluto
Bluto/Brutus .