Italy Joins China's New Silk Road Project

Hmm. Italy allies with an evil dictatorship that has a concentration camps for millions of minorities, and prosecutes religion by shutting down churches and jailing pastors. Sounds familiar...

The US has allied itself with China since the 80s...

The US is not an ally of China. It cooperates with China to maintain peaceful military and political relations in Asia and it has vast trade with China. There's a dramatic, fundamental difference between being an ally and being a global competitor that you try to get along with (ie try not to go to war with as you collide repeatedly on matters of perceived national interest).

Britain, France, Germany, Poland, Canada, Australia, New Zealand, Japan, South Korea, Philippines, etc. Those are allies of the US. I don't think there's actually much confusion in the difference between a US ally relationship like Britain and the modern US relationship with China.

>There's a dramatic, fundamental difference

Yes, the difference being "when it suits the US it's OK, when it suits somebody else, it's bad".