Over the last two decades, we have witnessed a nearly unprecedented shift in how companies operate in pretty much every respect. Among other things, the new technologies have made it more possible and viable for companies to employ teams that are far more heterogeneous than anything that was possible in the past.
In short, the multicultural team has become a norm and managers are having to learn how to manage such teams. This is nothing to hold against them. It is simply a different reality, with new challenges and ways to overcome these challenges.