Microsoft has, and always will be, public enemy number one in the eyes of the fosstards. To them, Microsoft is the most evil corporation in existence. How dare they become successful, how dare they charge money for their hard work, how dare they listen to their customers! They had an anti-trust suite filed against them, you can’t get much more evil than that!
Naturally, the fosstards have no trouble snuggling up next to Google or IBM. Both have open source labs, so it means they’re altruistic, pure of heart, and want to make the world a better place through open source. Neither of them has any proprietary software (GMail, Google Docs, Google Apps, Google Maps, Google Analytics, DB2, etc.). Neither has had an anti-trust suite filed against them. Finally, neither has ever sold computers to the Nazis.