The labor practice of using force to compel the use of union labor was outlawed by the Hobbs Act in 1951. The Hobbs Act was vitiated by 1973's Emmonsdecision, where unions were authorized to use violence to achieve "legitimate" objectives.
Estase thought the reason we had laws was to prevent people from using coercion to take from others. Instead, what Justice Marshall did was institutionalize violence. Congress needs to make it clear that murder is not a bargaining tool.