I have been tempted to throw away exactly one book, The Throne of Saturn, a science political fiction novel by one Allen Drury, concerning an extension of the Apollo program. Wikipedia has this to say about it:

"[Drury] dedicated the work "To the US Astronauts and those who help them fly." Political characters in the book are archetypal rather than comfortably human. The book carries a strong anti-leftist/anti-communist flavor. The book has a lot to say about interference in the space program by leftist Americans."

As someone who is both a big fan of the space program (which is why I naively plucked the book from the bin) and a dirty "leftist", I was offended and dismayed by much of the content, even as a historical piece. The astronauts are portrayed as paragons without flaw, with the exception of the one black man on the program, who everyone (including himself) knows is only there as a token. Liberals are naive dupes of inhumanly villainous Russians. And so on.

In the end, my respect for books (even toxic ones) won out, and I simply returned it to the bin where I found it.