The modern clergymanhas acquired in his study of the science which I believe is called exegesisan astonishing facility for explaining things away, 

but the subtletywith which the Rev. Robert Strickland has “interpreted” all the facts in his father’s life which a dutiful son might 

find it inconvenient to remember must surely lead him in the fullness of time to the highest dignities of the Church. 

没看懂这一块：...which a dutiful son might find it inconvenient...

1)which引导的定语从句的先行词是哪个？

2)在这个which a dutiful son might find it inconvenient定语从句中，成分该如何分析？it指代什么呢？