How does the speaker’s repetition of the neighbor’s cherished belief about the importance of walls (lines 27 and 45) convey the poem’s criticism of an undesirable social pattern?

answer: if though all maps are biased we study them to tell we have to go and use them to tell the direction we have to go but if you don't want to use a compass to find the way to go then the only option is to use the standard maps made by the european's  

explanation: