I always thought it was interesting feds don't have jurisdiction over most murder as it doesn't fit into one of the constitution approved uses of the federal go

I always thought it was interesting feds don't have jurisdiction over most murder as it doesn't fit into one of the constitution approved uses of the federal government, but somehow merely sawing down a shotgun barrel or feeding crops you grow to your own animals is considered 'interstate trade' and thus subject to federal law. As if murder doesn't have effect on interstate trade at least as much as Filburn's crops did.