This is like saying "it's not my fault that trains have a lot of mass and kinetic energy", after you are warned against pushing people in front of them and do it anyway.
Not even close. Trains would be quite useless if they did not have a lot of mass and kinetic energy. People should already strive to not be bigots regardless of what google does or doesn't do.
There's a line to be drawn between "don't be evil" and "don't do evil". With such a huge organization, things slip through the cracks and accidents happen that result in bad things. But I find it hard to believe that Google decided to out someone.
They were warned about the negative consequences of identity conflation, then built a system that did just that. They didn't "decide" to out someone, but they built a machine for outing people.