As was suggested earlier in the thread, Buddhism - like the Mongol invasion - can be ultimately presented as rooted in any of the four Realms, or even in the "fifth" realm, Mundanity.
Bhuddism is Divine. The seven Virtues are in fact nothing but the Perfections (Pāramitā). Cultivating them allows one to escape from craving (Taṇhā) and suffering (Duḥkha) - essentially the Infernal, or at least the "flawed" state that men inherit at birth (e.g. as a result of Original Sin). The result is salvation and oneness with God, viewed as ultimate enlightenment (Bohdi and) purity (Nirvana). Shaolin Kung Fu is a Tradition favouring Meditation, Purity, and Trascendence.
Bhuddism is Infernal. A subtle corruption associated with Pride and Sloth, Buddhism preaches that everything, including the world and even God - is but illusion. Man can achieve "salvation" by rejecting it, ceasing to strive (the quintessence of Sloth!), and finding enlightenment within himself (the quintessence of Pride!). Shaolin Kung Fu is an Infernal Tradition favouring, among others, Debauchery and Malediction.
Bhuddism is Faerie. The practices of Bhuddism are ways to generate vitality for Faeries, and the quest for salvation is the Ultimate Story. Many wise old monks are, in fact, Faeries, some of whom may once have been humans. Shaolin Kung Fu can be a Faerie Pretense, or Clesrada by another name.
Bhuddism is Magic. Criamon is the Bhudda, Repose is Nirvana, most Criamon Paths are the way to escape Illusion and the eternal cycle of reincarnation (with a focus on Apt Action, and becoming a Bhodisattva to aid others). Did I mention abstinence from meat and worldly ties? Shaolin Kung Fu is, ultimately, nothing but Labyrinth Meditations plus the Path of the Body.
Bhuddism is Mundane. Just as in the real world! Shaolin Kung Fu is a mix of Concentration, Athletics, Medicine, Brawl, and Single and Great Weapon.