I suspected when it came to worries about overpopulation, however, stated beliefs would be far more aligned with actual behavior than in the case of evolution by means of natural selection. Expressed concerns about sustainability and the like aside, people who would see it as just rewards if homo sapiens go extinct in the next century hail more frequently from the ranks of those who think the human population needs to be reduced than from among those who want humanity to be fruitful and multiply.
Indeed, the GSS shows that tends to be the case. The following table (n = 1,520) displays the percentage of people aged 40+ who agree with the Malthusian concern that "the earth cannot continue to support population growth at its present rate" by the number of children they have:
But maybe I'm following the wrong scent in my hunt for hypocrisy. If the rapture occurs in the near future and only those judged unworthy of heavenly entry are left behind to expire, the fulfillment of prophecy will have happily occurred and the result will be one in which the earth certainly will no longer be able to sustain it's current growth rate, yet you'd be correct to think that most believers ignore this when they fail to express concern about indefinite population growth in the future!
The following table (n = 2,392) reveals their hypocrisy by showing the percentage of people who don't think the earth can sustain current levels of human population growth by confidence in God's existence:
GSS variables used: YEAR(2000-2010), AGE(40-89), POLVIEWS(1-2)(6-7), GOD(1)(2)(3-5)(6), POPGRWTH(1-2)