The Urban Housing Act was enacted in 1949 and embodied within the Fair Deal domestic policy implemented by President Truman.
This act contained provisions that extended the participation of the federal goverment in the insurance and issuing of mortgages and for the construction and provision of public housing facilities. It also contained renewal programs specially targeting the end of slum settlements.
There are not many laws and stuff so sometimes people can do random stuff thinking there is not a law for it and end up well in jail for long prison sentences
Explanation: fear because if they create fear people will be willing to do what these terrorist groups want them to do such as partake in a new religion, join them, etc.