Reason #1 is personality conflicts. Each and every one of us is a unique creation with a personality that's a complex mix of genetics, environmental influences, and collective experience. Modern science still doesn't have a clue as to how these factors mix to make us who we are, and it doesn't look like they will any time soon. What we do know, though, is that certain personality types just don't play well together, and there's not much you can do about it. We naturally clash with our polar opposites, and there's no way to you can see eye to eye with somebody who thinks and sees the world from a viewpoint that's so drastically different from our own that we can't fathom it. So if your spouse is the emotional polar opposite of one of your parents or siblings, expect frayed nerves. People can't see eye to eye on what they don't understand, and the best you can hope for is an agreement to disagree. Demanding harmony is like lighting a stick of dynamite and being surprised when it blows up.
Reason #2 is unrealistic expectations. Sometimes we expect people to do things they simply can't do - we want them to rise to levels they can't reach yet. Feelers won't become thinkers, fighters won't become diplomats, sci-fi fans won't turn to romantic comedies, and some people won't clean their house no matter what day it is. Can people change? Absolutely. Will they change? That's a personal choice. Should they change? That's an issue best left between them and the Lord, and it's wise to stay out of that territory.We could do ourselves a great favor to accept people for what they are right now - not what we want them to be, or hope they'll become "someday."
Reason #3 is that relationships aee copmlicated and sometimes things happen that create conflict that simply can't be repaired by the magic of the holiday season, It takes a long time to rebuild breeched trust, and that process isn't going to speed up because there's a date in red on the calendar this month. You must accept that we're all human beings and, by nature, are flawed. It's literally impossible for everybody to get along. Sometimes you have to decide which relationships matter the most and focus your attention on nurturing them, even if you must neglect others you'd like to make happy and even if you aren't asked to make the choice. It's not taking sides - it's good, old fashioned, common sense. Everybody in the world isn't going to love you. In fact, I can guarantee that at least 50% of the world will have a problem with you - more, if you insist on trying to make everybody happy. But at least if you're honest people will know exactly where they stand with you, and 100% of people appreciate honesty like that, even if they don't like you.
I know this is tough because we all want our holiday to look like a Norman Rockwell painging, but it would behoove us to remember that our expectation for a perfect holiday is art, and we live in reality. That doesn't change, no matter what time of year it is. You can accept people as they are and be happy with their best, or you can cling to unrealistic expectations and deal with inevitable frustration. Because when you fight reality, you never win. This world has been here far longer than any of us have, and trying to bend it to your will is an exercise in futility. You fare better if you accept reality and do your best with it.
The choice is yours.