I’m no fan of The ‘Toon’s, but what is racist about the postcard? The only thing racist about it I can see is that some are calling it racist, which gives me insight into their minds which appear to be racist.
You’re quite correct, of course, that an inanimate object cannot be “racist.”
That said, the postcard presents a racial stereotype which, rightly or wrongly, would offend many (probably most) black people. Note, however, that no such sensitivity would occur among white people similarly treated. It’s a characteristic of those within certain groups, some minority and some not, identified as worthy of “protection” and “special status” by the left, to be very sensitive to any slight, intended or not.
Therefore, anyone that intentionally, or thoughtlessly for that matter, doesn’t take that probable sensitivity into account, could rationally be suspected of harboring, in this case, racist attitudes.
I personally think that this type of sensitivity is BS and indicative of a maladjusted personality. But, then, I have never cared much about what anyone else thinks of me, I know the truth and that’s good enough to let me sleep well.