Awww Sanch you are gonna be disappointed in me...
I live in Southern California just south east of Santa Barbara....and I can't think of a more populated global community than the areas around me.... Asian, African, Latin, European, Canadian, UK - you name it... It's like a tiny United Nations all broiling around in the sun, grumbling, making money, working, getting their kids to school....you know.... nothing new and nothing different.... and there are racial incidents but no more commonplace than any rudeness that goes on among people of the same race....and the same kind of crimes too....not necessarily attributed to race at all.
It's an equal opportuity place...to make what one wishes it to be.
My bi-racial relatives live in Canada however as do all but a few of my family members. Perhaps you would be happier there, and that would translate into more relaxed perspective for you and your family too. You sound unhappy with your environment as it is now. That would wear anyone down...and the children will pick up on it like the little sponges they are.