Thanks for finding the quote. Regardless, the author says that the politicization is alienating conservatives, not the program itself. If Google allowed for an open discussion about its diversity program, the author would not have this criticism.
He's saying the program itself is, and this is the reason why.
"Politicization" is quite vague and the author doesn't explain exactly how these programs are "politicized" or what that means. I suspect it comes down to their mere existence.
