Why aren't Buddhists Supposed to Eat Garlic and Onions?

[ebola?]

Are they mutually exclusive?

Nope. Asceticism plays a key role in many variants of Buddhism, though given the development of the "middle path", starker asceticism is more often retained in various Hindu practices.

Well yeah, i guess so! You either are or you aint.. its the equivalent of people stouting they are christian when they dont go to church. Rules are rules and there are no less important parts of written scripture than the next.

How do ascetic practices violate core tenets of Buddhism?

ebola