Budhism preached 'suffering' was the way to 'emanicpation'
After studying Buddhism he converted and became a peaceful king and stopped warring so much so that his opponents easily overthrew him soon and he lost his empire for ever!
That's two reasons you didn't become a Buddhist, but both are wrong.
http://en.wikipedia.org/wiki/Ashoka#Death_and_legacy
The link is about Asoka and his legacy. he ruled for 40 years, after inheriting the largest empire on the Indian subcontinent. He wasn't overthrown but converted to Buddhism, kept an army for the defence of the kingdom and was very sucessful in his promotion of Buddhism, but also his tolerance and support for other religions.
Either your sources are competely wrong or you didn't study Buddhism that much.
I'm happy that you're Muslim. It's your choice. I don't think much of propagating false ideas about another religion.