The V2 assembly site was located right next to a concentration camp, and they used slave labor from that concentration camp to build the rockets.
Do we know for certain that he believed in the ideals of the Nazi party? No. Did he ever try to fight the system in even the smallest way? Also no.
The best you can say for him is that he was indifferent to the suffering of the slaves being used to assemble the rockets, and willing to allow the rockets to be used to attack London.
In the “Nazi bar” analogy, he’s a Nazi who goes to the Nazi bar wearing a Nazi uniform, and the best you can hope for is that he’s going for the beer and not because he likes hanging out with the other Nazis.
Yeah, with the current system, the only real hope for a major third party is for one of the major parties to split. Because any small third party just eats up the votes of the major party closest to its position. But, big parties only tend to split when they face major electoral defeats and there’s a lot of infighting. That means that not only did they lose, but now due to being split, they’re not even an effective opposition, and the other major party wins more easily than ever. (Which tends to lead to complacency and corruption, which tends to lead to eventual electoral defeats, once the other party gets its act together…)
And then there’s the problem that the only people who have the possible power to pass electoral reform belong to one of the two major parties, and it’s completely against the interest of those major parties to get rid of FPTP, because FPTP locks in their duopoly. That’s why, for example, when the Canadian Liberal party promised to get rid of FPTP, they abandoned that promise as soon as they were in power.
Maybe reform is possible because people are human, they don’t always optimize for the perfect win in a game. But, game theory says that it’s going to be a major uphill battle to pass any kind of reform.