We are both preaching, thats what the comment section is. I am telling readers (not just you) that if we want a less car brain america we have a lot of work to do.

You are preaching to other readers (not just me) about why biodiesel > electric cars. If you were talking directly to me, I would say:

• one does not simply replace the engine on a low mileage honda into a diesel. Sure, if I find myself having to choose between fossil fuels and biodiesel i will choose biodiesel but I ain't buying a car for a long while. I want to run my car to the ground first and maintain it instead of just buying a new car.
• you personally haven't made a convincing argument about why electric cars are worse for the environment. This may be true now but may not be in the future. electrified trains still run on fossil fuels to from power generation (in america). Renewable and battery tech is improving. Personally I have been all in on buying a good electric car but I haven't found a good option yet. I have a hard time weighing the environmental cost of mining lithium over the environmental cost of burning biodiesel or wood, should you want to convert your car to run off wood gas.
• a friend of mine had a biodiesel car in LA and would talk about how she would go around to restaurants to get used vegetable oil to run her car. Cool. Not really scalable but neat. I suppose there are a few more biodiesel stations around, that number likely needs to expand and production of biodiesel needs to be ramped up. Assuming the demand is there.

It would be easy to write me off as another carbrain, and maybe I am. My larger point is just that this shit is a lot more complicated than people think (for america at least). I didn't even mention the whole towns that support the coal / oil industries because they employ half the town. In america, conservationism is blocked by conservatives.