Saying thanks during christmas eve

After my family finished their thanks prayer(oh god, thou who hath done everything) I decided that I wanted to thank the people who made the food, prepared it(my mom) and made such a nice dinner possible. What was the answer from my dad? God made them. But you just said that my mother did nothing and you are thanking god. God made everyone who made the food therefore we have to thank god. How much more stupid can he get? I don't know.