The use of reasoning with a person who has BELIEFS is difficult.
There is an old saying that " it is almost if not completely impossible to "reason a person out of a situation that he was not reasoned into".
Beliefs are installed into our brains through the use of our emotions and fears.
Using simple situations like the membership of the wbts with the United Nations non governmental organizatons for about 10 yrs. May be more shocking and easier to understand and explain.
Think about your fathers emotions and what things would really catch his attention that are rather simple to describe, prove and discuss the hypocrity of it all.
At least these are the things that had the most influence with me. Best wishes and good LUCK with your plans. I hope all goes well with you.
Outoftheorg