The plane landed safely and none of the 90 people on board were harmed.
The Boeing Max 8 737, which took off from the Ethiopian capital of Addis Ababa, crashed six minutes into its journey to Nairobi, Kenya.
"You need to stop doing this," Ethiopia's new PM tells attackers. You weren't successful in the past and you won't be successful in the future."
The dump is the only landfill site in Addis Ababa, a city with more than 3 million people.
Hailemariam Desalegn blamed the violent protests on "anti-peace forces."
More than 140 protesters among Ethiopia's largest ethnic group have been killed since November 2015.
Plans to expand Ethiopia's capital have been dropped, but protesters are still being killed, HRW says.
Kidnapped at 14, Aberash Bekele shot dead her abductor. Now her story has been turned into a film.