"Or is it Darwinists redefining thermodynamics to support their theory?"
Yeah sure, you obviously have never had a single class in thermo. Nothing in macro thermodynamics is much in dispute (unless you go to Quantum or Relativistic levels). If thermo theory, even in relationship to evolutionary questions, were at all in question, things like jet airplanes, your car, computers, etc. wouldn't work either. This is as close to 2+2=4 level stuff as there is.
Anyone who repeatedly uses the phrase 'thermodynamic mechanism' surely never has.