Why didnt jesse have any push back

Walt just decides the best way to eliminate Emilio and Krazy 8 is by dissolving their bodies in acid. Jesse had known Emilio since the 3rd grade all he says is that's messed up but never tries to talk Walt into a more sensible option to use.

If you have known someone most your life why would you agree to do something so heartless and not suggest atleast another more humane option.