Christ Almighty is a Valid Curse Word

Yesterday I was talking to a friend who is very proficient in English and is a native speaker of Spanish. I admitted that once, in exasperation at my four-year-old wanting to go outside but resisting me helping him put on his winter clothes, I blurted out in front of the kids, "Oh Christ Almighty, just put on your coat!"

My friend thought it was the goofiest curse he had ever heard.  He told me that was not a real curse, and he was going to ask other native English speakers if it was a joke.  "All I know is that Craystamaiatin is no curse!"  He said it sounded at best like a minced oath.  Even if someone used it in anger, esp with crisp and nasal Midwestern accent, he'd have a hard time not laughing aloud.  

This is a common curse.  It's interesting how words are perceived so differently based on our background.