re: How about....
The religion of the far Left, that all earthly problems are solvable if you simply have enough political power to deal with them, has killed a hundred million people this century, and variations on this philosophy are still being taught in many of our schools. More places than creationism, I would warrant.
This concern is dismissed with outright laughter here. Why should I take creationism being taught any more or less seriously?
"The medical care is free in Cuba!" "Saddam's regime was stable!"
The "at least the trains ran on time" type of defense you describe has been used by more than fascists.