Look at Ibraaheem’s [alayhis-salaam] gentleness “O My father! Why do worship that which hears not, sees not and cannot avail you in anything, O my father! Verily! There has come to me of knowledge that which came not unto you.” He did not say,‘’O father you’re Jaahil’, but he [kindly] said that he has received knowledge which his father has not received.
Source: Qisas Al-Anbiyaa by Imam Sadi p45