I find it fairly amusing that "green" parties were ever opposed to nuclear power. It was clearly lobbying by fossil fuel energy interests. If we're gonna generate electricity at night without burning coal, oil or gas, we need nuclear. Storing solar and wind overnight is an even more absurd proposition than nuclear power plants. Burning more fossil fuels is even more absurd than nuclear power plants.
This is a bit too cynical. It's impossible to understand the history green parties' opposition to nuclear energy without the context of their opposition to nuclear weapons. The argument went that "civilian" nuclear infrastructure was deeply interconnected with nuclear weapons. They share infrastructure. The existence of a civilian nuclear fuel cycle brings into existence a latent nuclear capability (you may recognize this theme from such films as the United States vs the Islamic Republic). Creating fissile material while avoiding diversion and proliferation requires the secrecy, security, and centralized technocratic control of what activists sometimes called the Atomic State, which they argued was incompatible with liberal democracy. I think these were quite serious arguments, though of course they'd persuade only if you're already bought in on unilateral nuclear disarmament.
Once upon a time, there was also the Soviet propaganda effort in the West. Many of the Cold War reactors could be used to produce not just electricity, but fission material for nuclear warheads. Meaning that if you could persuade big countries to give up nuclear energy for good, you'd also reduce your adversary's capability to build and maintain their nuclear arsenal, or preempt its future acquisition in the first place.
Soviet Union (and later Russia) enacted the propaganda effort against nuclear mainly to prevent the west from ditching their fossil energy. Less western nuclear warheads was secondary goal at best.
Military forces never had any problem running extra reactors to acquire their material.
Correct, but it still was framing that would be useful to have. If nothing else, because civilian reactors mean there's also a civilian program, an educational program, and the military would like to have that around.
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Please elaborate
The Green Party: https://ecfr.eu/special/mapping_palestinian_politics/hamas/
Uh huh.