> I mean can you prove the damaging effects?
See the in-your-eyes clickbaity titled video.
> Do countries with high milk consumption have shorter life spans?
Total lifespan is dependent on a lot of factors. But YES moving to dairy as a population shortens your lifespan by greatly increasing a bunch of sicknesses. See "the china study" for more in-depth info.
Just for your information:
https://www.uth.edu/media/story.htm?id=1692785a-5886-46e8-81...
Reading the Wikipedia article on the "china study" doesn't seem that it's all definiteley related to dairy (or animal food consumption).
Do countries with high milk consumption have shorter life spans?