I hate it when my wife - Makes me feel bad about my family

Our families do things differently.
But my wife makes it a point to harp on any minor issue that comes up with my family.
I do not do this to her. Her defense is that her family does not ask for the same things, or treat me the same way, but this is because i do not have a close relationship with her family. None of her family members would start a conversation with me.
My family on the other hand has tried to include my wife, and speak to her, but she sees this as annoying, and would rather just be left alone.

If any of them does something, and she does not approve, she makes all of these comments about them that i have to just sit and endure. If i make any motion to say anything in their defense, it turns into a large fight, with her basically giving the ultimatum to choose between her or them, and decide who has priority.

I suppose the correct answer is to minimize her contact with my family. But this feels counterproductive. It feels like i'm creating a problem instead of solving one.
But oh well.