Sibling and I can never agree on anything, causes family fights what to do?

I have a younger sister with whom we have a little in common, but most of her life and political values are completely opposite of mine.
But it’s come down that the way she raises her teen children has been on her life values and beliefs. While everyone is entitled to their own opinions/beliefs, many of hers are personally hurtful to me and my children. I am close to her children, but the older they get the more they are becoming like my sister and it’s not only putting me in an uncomfortable relationship, but also my children whom aren’t getting along with their cousins over things they say.

I have tried my best to not take it out on my nieces and nephews, and told my sister how I feel. But she refuses to change or at least stop trying to push her beliefs on me and my family and make us feel guilty that we don’t agree with her. Being the older sister, my values are the way our Grandparents taught us, I guess my sister being younger doesn’t believe in following tradition and wants everything changed.

I don’t know what to do anymore 😔

Sibling and I can never agree on anything, causes family fights what to do?
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