Question

Why does Pip treat Joe so snobbishly?

Answer 1

ANSWER:

    "Pip receives a letter" from Biddy saying that Joe is going to "visit Pip in London". Pip does not want Joe to meet his enemy Drummle who uses Joe's low social stature against Pip. He is very much concerned about his social status. When Joe arrives, Pip speaks of his clumsy manner of climbing stairs, clunking of his loose boots. Joe senses his anxiety and apologises that he would never visit London again.  

Pip realizes his snobbery for treating his beloved friend in that manner.