Why? The Marshall Plan which inculcated the ethos of the New Deal. Germany kept it's manufacturing sector and maintained a strong Labor movement. Further never had a Reagan or a Maggot Thatcher. Instead we had Reaganomic Social Darwinism, the death of unions and flight of manufacturing.
Additionally, Reagan owed Iran so he flooded the inner cities w/ Central American cocaine. When that blossomed in to a Crack and Gang epidemic, he convinced the whites that that's just how Black folks are. Which is why we still have Random Summary Executions of Black men women and children.
What Americans need is money in their pockets. That creates job, raises tax revenue, allows communities to afford quality education. Food deserts, on the other hand, increase violence because we become violent when we are hungry.