User blog comment:Bowser101/A Tribute to the Stupidity of Shipping Wars/@comment-844113-20100226143016

It's because nobody cares what Baljeet is doing (Isabella and the Temple of Sap, anyone?).

Seriously, though, it's because he's not a titular character. Why do you see so many flame wars over Phinbella and Ferbella and Feretchen and Femily and MaraPhineas? It's because they are popular characters. You don't see flame wars over secondary characters like Baljeet and Buford because they are not the point of interest on the show. The show mainly revolves around Phineas and Ferb and what they do every day, so people pay more attention to them, and who they should be paired with.