Whenever you create a zfs send stream, that stream is created as the delta between two snapshots. (That's the only way to do it as ZFS is currently implemented.) In order to apply that stream to a different dataset, the target dataset must contain the starting snapshot of the stream; if it doesn't, there is no common point of reference for the two. When you destroy the @snap0 snapshot on the source dataset, you create a situation that is impossible for ZFS to reconcile.

The way to do what you are asking is to keep one snapshot in common between both datasets at all times, and use that common snapshot as the starting point for the next send stream.