Why did the united states use questionable methods in gaining the panama canal

The United States tried first obtaining the Panama Canal with legal and unquestionable means, but Colombia who had control of the Canal at the time, didn't agree to their terms, so they resorted to questionable means.

Urban growth invariably feeds increased commercialization and industrialization. it requires continually expanding land areas. when urbanization rates are high, and countries do not have the institutional and managerial capacities or economic wherewithal to manage such rapid growths, they exert intense pressure on the types and nature of the resulting settlements. they contribute to the development of overcrowded slums and shanty towns without adequate essential services and necessary infrastructure.-by asit k. biswas and cecilia tortajada