You need to revisit history on how Detroit got into its predicament. Yes there was rioting and attacks on police. They then elected a democrat, high minority political infrastructure and went straight into the crapper.
Ferguson is its own mess, Detroit is actually crawling out of its hole. If anything, Ferguson is where Detroit was 50 years ago and heading in the wrong direction. Detroit is actually heading in the right direction which is something that really can’t be said for any other major city in the country.
Ferguson is its own worst example.