[wagglebee]

"See", they say, "we don't need God to explain the world. We have another explanation that doesn't require a God."

This belief gives them justification for establishing their own rules of right and wrong. Their own rules for morality.

Absolutely correct!

[AmishDude]

The biological sciences certainly see the imposition of ethical restrictions as a burden. They would certainly like to lessen those restrictions, even if they misinterpret the source of them: animal rights, for example, are not theologically imposed, in the main.

This explains an open and quite bitter hostility to any religion. Then again, not any religion, only the most inconvenient ones.