Hugo and Fidel Arguing?

This a very intersting but short article about a letter published by the press that Castro supposedly sent Chavez. Fidel definitely expresses some angry, or perhaps resentful feelings. Given that Cuba needs Venzuela for oil, it seems very bold of Castro to publish such a letter. http://www.tiemposdelmundo.com/Politica/2007/11/22/carta_enviada_por_fidel_castro_a_hugo_chvez_causa_controversia/9295/