Hosea seems intent on naming specific places (for example, see this question). What is the significance of Shechem being named here?
Ho 6:9 And as troops of robbers wait for a man, [so] the company of priests murder in the way by consent: for they commit lewdness. -AV
Shechem - means 'shoulder'. The thigh is consent of the will(life) related to the foot/walk. The shoulder refers to 'consent of works'.
But it also refers to the lewdness of Simeon and Levi in killing en masse at Shechem by allegory. They had turned the covenant sign, one of life, into a mass murder.
The law was given with the command "Choose life!" but by the time of Christ is called the "law of sin and death" by Paul.