"The oath implies that an MP is required to defer to the country’s interests and that of the Constitution where there is conflict between those interests and what the party that put you in Parliament wants; the oath, in other words, demands that MPs exercise discretion at all times to check that they are abiding by its precepts." 
Unfortunately we are dealing with marxists who believe 110% that Party=Country=unfetted power. Anything that goes against that is treason and an attack on 'The People'.