Lying to your family and not telling them that you came into a ton of money would be the thing that could piss them off the most. It would seem like either you are being selfish and want it all to yourself or they will think that you think they are money grubbing moochers.
Also, yea, I could see not sharing some of that wealth with your family could come off as bad as well.
It's not about paying them off. If you love someone, you want to help them and make them happy. Not doing so seems selfish and the opposite of that.
1) If you have wealth, you are obligated to share your wealth with your extended family.
2) If you make a decision to not share your wealth with your extended family, they have a right to be mad at you.
This must be a cultural thing because I can't wrap my head around it. In my culture, money and family relationships are completely separate things. Our family connections are based on staying in touch with each other and spending time with the ones who are worth your time and attention. Money doesn't enter into the relationship at all. In fact, I'm reasonably certain that if I were to offer money anyone in my family, they would be deeply offended.
> If you love someone, you want to help them and make them happy.
This is a fallacy: money does not solve problems and it does not make anyone happy. You'll figure that out on your own eventually, though.
So... you don't care if your family never talks to you again? I would.