Don't neglect the effet of clan spaniel on young clanners psych. It inscribes itself in a long tradition of propaganda.
Quite the many years ago I was quite amused to learn that most youth litterature in imperial Japan centered around a standardized plot of "teenager saves the day against the ennemies of the rising sun"...we know how that went. Drilling kids about dreaming of violently defending the realm is standard practice, and most assuredly is of surprising effectiveness. The GI Joe joke is actually probably spot on.
And its true on many levels. On a more mundane topic, the number of north-american gen Y kids first sensibilized to environmental issues by "captain planet and the planeteers" must be astounding.
And since I'm posting here...
I fail to see how the clans COULDN'T come up with a thought current in the vein of crusader philosophy. Of course, from there, its only inevitable that it becomes the leading tought current.
From an ideological perspective, the planets of the inner sphere are the "lost, promised lands". Kerensky didn't launch the exodus to escape the 'sphere, but rather the corruption. And then, there's always Terra. What a draw the craddle of humanity must be. Wether you wish to protect it from outside forces or from itself, you still long for it. 'Tis but a dream, but it is one you can reach for, and there's only so much to hope for in the clan homeworlds.
From a cynical point of view, war always drags commercial opportunity in its wake. Clan homeworlds are poor, underdevelopped. It might be by design, but how could the merchant caste be eternally content with this state of affairs? And merchants always find a way. besides, trueborns, for all their supposed power, are but products, and isn't it waste to let that which you manufacture rot and dull through missuse and neglect? The clans function much like a corporate entity (from a detached point of view, forgetting about the whole "dark age warrior democracy" on top). They must expand, and their nature dictates this must be acheived through combat for their identity is that of an arms company rather then a house appliance one.
Where are the clans, as a whole, to expand besides the inner sphere? How is their best and most lauded product to acheive its full potential but through an expansion into the inner sphere? How could one deny 'tis their destiny to make the attempt?
Once the golden century and the initial develoment of the homeworlds was complete, the existence of a movement like the wardens merely stems from natural opposition. Much like the situation makes the man rather then the other way around, the wardens exist because the crusader mindset is the natural state of things once the conjoncture is ripe.