I have known several Buddhists and/or practitioners of meditation who claim that the rise in, "consciousness," brought about my Buddha's teachings/meditation endangered the status quo of India, making people less willing to tolerate abusive leaders, or hereditary leaders at all, and making them less willing to spend time producing taxable wealth, and generally being more tolerant to outsiders and less wiling to wage war.
They claim that there were, "wars," to suppress this enlightenment.
Is there any historical truth to this?
That is entirely false. The age Buddha lived in India, was marked by quite a flux in culture and religion. Hinduism was moving from the Vedic form to its present form, Jainism was gaining influence, thousands of preachers walked on the land, Buddha included.
The general idea towards this can be seen in the behavior of Ajatashatru, the king of Magadha, and quite possibly the most powerful man in India at that time. He was born Hindu (Brahamanic religion, if you prefer), followed the Kshatriya Dharma, encouraged both Jainism and Buddhism, and eventually (is believed) to have accepted Jainism.
In fact, Jainism was far more influential than Buddhism at that time. It was only during the reign of Ashoka that Buddhism stopped being a local cult and spread over India, and East Asia.
As for people being unwilling to tolerate hereditary leaders, it should be remembered that Buddha himself was a Sakya prince. The religion gained more movement with the Sakya royalty supporting it, but the royalty itself continued business as usual.
tl;dr Wars to suppress "enlightenment" are unlikely, there is no direct or indirect proof in support of that idea.