I find it hard to understand how you would be against Microsoft pointing out an obviously bad thing Google has done (in reference specifically to them altering

I find it hard to understand how you would be against Microsoft pointing out an obviously bad thing Google has done (in reference specifically to them altering the behavior of their shopping product). Since when is it a bad thing to highlight differences between your and competing products? In many cases your competition are the only ones with the resources to effectively alert your customers to such a change. This is market forces at work.