Yes, because we save money by not having to support the illegal and their children. We also don't have to spend $$$ to keep them in prison.
Unless its for a violent criminal, no.
Why deport when you could use methods to prevent illegal immigration or help integrate them into society?
It isn't a fiscally responsible thing to do.
It isn't. But summary execution is, because it removes the chance of them coming back.
Use the money to stop illegals from coming in the first place