We need oceana quran expert here.
Abrogation - ignoring the contradictory parts of the absolute word of God. I mean the miracle of the qoran and of 1/3 of it is contradictory. 
Ask for the taqiya free version of why non muslims(mushrikun) should apply a reverse jizya in non Muslim countries? Ask why we should allow mosques when christianity and churches are forbidden in Saudi Arabia. Always ask him for a taqiya free version of everything you ask. Ask why Muslims should be treated as equals in civilised society when they cannot treat non Muslims as equals in their uncivilised societies. Why are Muslims more likely to be repeatative pedophillic gang rapists (europe/uk)