It's ironic that Slashdot is objecting to these hearings yet at the same time seemingly against legislation that would mandate that public policy be based on publicly available Science.
I don't think so. Mandating public policy to be based on publicly available science would for example end all and any teachings of "creationism" in schools.
It would also end faith-based politics like "trickle-down tax exemptions", facilities that allow companies to use overseas subsidiaries as tax shelters, H-1B visa (there's no evidence that these jobs can't be adequately filled by natives), spurious copyright extensions (like the one enacted to save mickey mouse from entering the public domain), viewing corporations as "persons" in a number of ways, allowing employers to curtail medical expenses (like abortions) based on "faith-based considerations", and all attempts to loosen or reverse a complete separation between church and state, and it would prevent e.g. the US military from preparing for effects conflicts that (demonstrably and indisputably) have their roots in global climate change.
In other words
Of course I understand that. What those congregationists actually *meant* is that people going on about environmental damage due to conventional drilling, fracking, unrestricted logging, GMO's, bans on insane amounts of antibiotics being used in hog-farming and chicken farming, and other man-made catastrophes should be held to much much higher levels of proof than are needed for scientific consensus.
They should instead be held to the level of proof that you'd get from exhaustive 50-year contrast studies to deal with all industry-sponsored "studies" casting doubt on anything from basic statistics, data-collection, modeling, personal motivation of the personnel involved, representativity, and explanation of any number of far-fetched and shady counter-examples to the general conclusions being reached. By which time the issues have become moot anyway, and profits from irresponsible behaviour have been safely pocketed and are protected by they occurred before there was any law against whatever abuse they were derived from.
Since Slashdot is at least somewhat representative of the US population, consequences like this are going to find few takers. So there's your answer: it isn't ironic, it's a fact of life.