more on deobandis (and barelwis)

Recently JinnZaman over at Global Intifada posted an article on the Differences between Deobandis and Barelwis which gives an enlightening perspective on the two groups. But to be honest, I personally don't understand how two groups that are so close (both Hanafi, both Maturidi, both looking back to Ahmad Sirhindi and Shah Waliullah, both respecting the various Sufi tariqats) could be so much in conflict. Why can't they just emphasize their (considerable) common ground instead of their differences?

Planet Grenada
the jamaa'at tableegh and the deobandis
a deobandi with a difference
differences between schools
ideology and temperament
ideology and temperament (the habashis)