Except you don't actually ban it, you just move it to texas.

That content is coming either way.

And if you require them to over offset their load to the grid, it's literally fossil fuels burned over all.

Except they wouldn't move to Texas but would also build in Texas. So you don't get a less polluting datacenter but you get one less polluting and one more polluting datacenter. A Swedish datacenter doesn't simply replace one in Texas, it's an additional one.