Winchester 73, he was saying that his education went far beyond math, in that he learned basic manners and courtesy.
In other words, his education included both the quantitative and the qualitative, and he thinks treating others courteously may be more important than math.
He implied that you had not been paying attention to those portions of your education that may have dealt with courtesy.
Your initial reply gave him some reason to think that; your follow-on justification of your initial reply seems to bear him out still more.
Edit: One last thought - based on his location (Caracas, Venezuela), it's possible or even likely that for micromontenegro, English is a second language. Faulting him for inexact terminology may be just a bit silly, on the part of a native English speaker.
In other words, his education included both the quantitative and the qualitative, and he thinks treating others courteously may be more important than math.
He implied that you had not been paying attention to those portions of your education that may have dealt with courtesy.
Your initial reply gave him some reason to think that; your follow-on justification of your initial reply seems to bear him out still more.
Edit: One last thought - based on his location (Caracas, Venezuela), it's possible or even likely that for micromontenegro, English is a second language. Faulting him for inexact terminology may be just a bit silly, on the part of a native English speaker.