I'm not wondering at all. The Godless Left and the liberal religionists traffic in lies all the time. It is a blatant and obvious lie to suggest that Christians disregard their biblical obligation to be good stewards of what God has provided - included the environment. It is completely sensible and congruent to believe in conservation and stewardship, will still acknowledging that there will one day be a new earth.
The need to demonize believers on all levels isn't a surprise, however. "Do no marvel, brethren, that the world hates you." - I John 3:13
I dunno. I've actually come across extremely fundamentalist types who figure it's not worth sending their kids to college because Jesus will come before the kids can graduate. It doesn't take much to extrapolate this attitude to a kind of nihilism which sees any planning for the future to be a fruitless exercise.