He is a Muslim and is allowed in his religion to lie about it if it benefits the advance of Islam.
Muslims lie when it is in their interest to do so and “Allah” will not hold them accountable for lying when it is beneficial to the cause of Islam. They can lie without any guilt or fear of accountability or retribution. A lie in the defense of Islam is approved even applauded in their “holy” books.
Muslims are permitted to lie: (1) to save their lives, (2) to reconcile a husband and wife, (3) to persuade a woman into a bedroom and (4) to facilitate one on his journey. Muslims are even permitted to disavow Islam and Mohammed if it is not a genuine heart-felt rejection. Muslims will tell you that concealment of a truth is not an abandonment of that truth if it benefits Islam.
But, woe to those who meet the real and true God on judgment Day.