First of all ,  God is to blame or humans?

Humans are to blame.

There is no reason to kill people, to destroy our world, towns, countries, children, make suffer vulnerable citizens just only due to ambition out of proportion of power and economic resources. This is sure we have an army to maintain safety , humans rights.

The rights to work , the right to food, freedom, education.

Personally, I think when the population is living with few resources, no food, no medications, lack of freedom, military intervention is needed, without any doubt in order to restore the civil rights.  From my point of view, the majority of leads do not follow the social interests, they act according to their own interests with poor management.

     Because of the military intervention ,  lots of deaths, suffering

It is clear to restore the rights in this world sometimes we need a war , however, it is the last option.