I am nearly 60 years old. Here is my advice.
Don’t waste your time with Idiots and Fools.
How many heartbeats did you waste trying to explain what every rational person already knows? In fact, I do not agree with some of your points because it seems to me that you are capitulating to him looking for some common ground.
As a Conservative, you and he have NO common ground.
Your Email to him comes off as groveling to me. Granted, I could just be in a sour mood, but you owe your F-I-L no Apology for your Convictions. You are raising his Grandchildren and your F-I-L gives not one iota for their future.
F him and F all his sycophant Obama loving Family and Friends. You and your Family are better of without his poison in your lives.
Change your Email and Phone Number and move on.
Obama Supporters make Useful Idiots look like Einstein.
They are beyond redemption and have no capability of rational thought.
Now, you may think I am a fool or idiot (or both) after reading my thoughts on your Vanity. If so, I understand.
My patience for all things Obama is at its end.
Believe me, that’s ultimately where this goes if he so chooses. I would be fine with it.