No, the 2nd law is not a net flow. It can and does apply to individual molecules and photons. No molecule will accept a photon of less energy than the molecule already has. No absorption will take place. The molecule is effectively transparent to that photon. This is from quantum physics.
Heat flows only one way. From hot to cold. You can't heat the warmer surface using a colder gas. You cannot reduce entropy in any system.
The Stefan-Boltzmann law is:
radiance = SBconstant * emissivity * temperature ^ 4
This means that if temperature increases, radiance MUST increase. It also means that if radiance is reduced, temperature MUST also reduce. The 'greenhouse' gas model reduces radiance and increases temperature at the same time. That is not possible.
The 1st law of thermodynamics essentially brings forward the concept of conservation of energy into thermal energy. It essentially declares thermal energy to be energy, and therefore subject to the conservation of energy law itself. CO2 is not a source of energy. It takes energy to warm the Earth. The Sun is not putting any additional energy than before. You are essentially attempting to create energy out of nothing, in violation of the 1st law.
I will call it the Church of Global Warming. All religions, regardless of what they are, are based on some initial circular argument, with arguments extending from that. The other word for the circular argument is 'faith'. Circular arguments are not themselves a fallacy, but failing to recognize one for what it is DOES become the fallacy. The usual method is to try to prove a circular argument. This is what a fundamentalist does.
The Church of Global Warming is a fundamentalist style religion. It denies science (specifically the 1st and 2nd laws of thermodynamics and the Stefan-Boltzmann law), and mathematics (specifically probability and statistical math). This religion stems from the Church of Green (the psuedo-ecologists trying to 'save the planet'). That in turn stem from the Church of Karl Marx. The Church of Global Warming is nothing less than an attempt to implement socialism worldwide, under the guise of 'saving the planet'.