Nah, I wouldn’t go that far. The russian gov’t has a general disregard for human lives, that’s all.
Well, actually there is very good information that the FSB let them walk in uncontested.
http://64.233.167.104/search?q=cache:WdPBNIR1eLYJ:www.iht.com/articles/2005/08/31/news/chechnya.php+beslan+border+%22allowed+the+terrorists%22&hl=en&ct=clnk&cd=3&gl=us&ie=UTF-8