You bet!
My ancestors (I"m pretty much 100% Scandinavian) consumed animal and animal products for thousands of years without issues (e.g....cancers, diabetes, arthritis, dementia, etc). Fruits and veggies very sparse....couldn't exactly grow them in that climate many months of the year. Sugar and carbs (e.g...grains) aren't anything they consumed.
As humans beings, it wasn't until recently (historically speaking) that we started replacing or supplementing our diets with such things.
Butter is not any of our problems....unless you are eating it with carbs and sugar laden other foods....which I guess is anyone eating a standard American diet. Bottom-line: stop eating that garbage and start slopping on the butter!