prince3009:
I believe the issue of this 737 Max 8 is partly a factory error, maintenance and pilot technique!

Since some American airlines have refused to remove them from their fleet and are confidence of their "safety and airworthiness", then I guess the previous crashes involving Indonesia, China and now Ethiopia were due to carelessness on the part of the airline servicing crew! QED!!
What makes you to believe due to carelessness of Airline ? For your information Ethiopian airlines has the best safety records all the times. Do you think all those countries including US would decide to ground this model with out confirming the plane has technical fault