I think he's making a joke based on your comment's wording.
Looking at rest of his comments in this thread, I think it's pretty clear that while he's half-joking, he does seriously believe that I'm somehow turning people into "racists".
Which is just... wat
Someone who's Asian could give a long convincing speech to turn someone into a massive racist as much as anyone could.
I'm not sure why you're so keen on "proving" that I'm "turning" people into racists. You have a fixed conclusion that you have already made, and are grasping at straws to reach that conclusion. Really bringing down the conversation for everybody here.
For what it's worth, I mostly just stare out the window in taxis/uber drives.
Your words could be misinterpreted as meaning that the journey with you talking to the driver is what makes them racist, and so I made a joke referring to that.