I did read it…all of it.
I have a suggestion but I am not sure you will like it.
I am a member of a 12 step group. One of the steps we take is the 4th Step - we take a thorough moral inventory of OURSELVES.
We do it by writing down our resentments and looking at each of the people, places and things we are resentful towards. In this case you would write about your FIL and your MIL.
You would write their names, and then WHY you are mad or resentful of them (what did they do) and then you would write down the injuries it caused you (how did their actions HURT you? Did it hurt your self esteem, your pride, your pocketbook, your personal relationships, your sexual relationships, your ambitions? Did it cause you fear?
Then you look at each relationship and you write down YOUR PART in the whole drama - leave them OUT of it and look at how YOU have behaved. Ask yourself what you should have done instead, how you should have behaved, write down the EXACT nature of YOUR wrongdoing…not their wrongs…YOUR WRONGS.
Be very hard on yourself. Really dig deep. Ask yourself where you have been selfish, dishonest, self seeking, frightened…where did you go wrong.
When you are done, you may have a better idea of how your character defects and your particular actions may have lead to problems.
For instance - and this is just a for instance - saying, “He didn’t REALLY want the phone but took it anyway”…wait a minute…this is a grown married man. He very nicely, but firmly, says, “No thank you. I cannot afford this. Thank you so much for thinking of me” .
You have all behaved badly, in my opinion. You have overreacted and she has overreacted and neither of you have clean hands.
Perhaps, if you were to take a really hard look at yourself and then take the writing to a priest for confession you may make some headway with your anger issues.
Again, this is just a suggestion.
you might try googling 4th Step or looking for a great book on the subject entitled A Program for You.
Meanwhile, you are in my prayers!