There is no way we can morally demand countries like North Korea and Iran not develop nuclear weapons unless we do all in our power to eliminate all nuclear weapons.
When it comes to countries with nuclear weapons I imagine an old West saloon scene after a gun fight has broken out. Bullets have been fired, many of the customers have pulled their guns and all is still as everyone is looking around the room waiting to see who is going to fire the next shot. In the calm, people are beginning to realize that everyone drawing their guns is a bad idea and will only result in chaos. Those that have their guns drawn are trying to keep everyone else from drawing and just adding to the tension. Since those with guns drawn don't completely trust each other they won't put their own guns down, but as signs of good faith they are starting to remove bullets from their cylinder.
Right now, this is about where the world is at. Those with nuclear weapons realize that it really isn't a good idea to have every country pointing nuclear weapons at each other. If we can convince those without nuclear weapons to not develop then we can work on reducing our own inventory. I agree that it seems hypocritical for the US to have nuclear weapons and tell another country that it can't, but I think it can be agreed that the fewer nuclear weapons that exist, the better off everyone will be.
For us as consumers it is better to save energy. It costs less and the money is spent improving our homes and our lives directly.
I agree that we should not be wasteful in our energy usage, but why should I have to give up some comforts that I enjoy just because we are too afraid of the unknown (nuclear)? I enjoy having a home that gives my kids room to run. It is nice to be able to run a dishwasher to do my dishes for me. It is really nice to have a clothes dryer for all of the laundry that inevitably comes with having young kids.
Nuclear can supply us with inexpensive, clean energy. Everyone talks about the extensive nuclear subsidies, but the subsidies are nothing compared with what renewables get. And it is nothing compared to the indirect subsidies that coal and natural gas yet by not having to deal with their waste stream. The very fact that nuclear plants are able to be reasonably competitive in price (current low natural gas prices aside) is absolutely amazing considering that nuclear plants are paying a "tax" to cover the cost of waste disposal. In addition nuke plants are required to maintain a decommissioning fund to cover the cost of cleanup when the plant shuts down.
Compare that to coal, gas, and renewable sources. Coal and gas emit tons of pollution freely. There are abandon wind and solar farms where the owners just walked away leaving their crap to pollute the land. Yet these costs have never been added into the subsidy calculation.
If we want cheap, affordable, clean power then nuclear is the only way to go. Unfortunately the public is largely ignorant about the realities of nuclear and instead has been fed a steady diet of Hollywood and environmentalist propaganda that over hypes the terror potential and completely misses the boat on even the most basic technical points.
We also have a Congress and NRC that includes a bunch of ignorant louses that also fail to grasp a basic understanding of the way a nuclear plant works or the actual effects of radiation. The result is insane regulations that cause plants to spend millions and millions of dollars on safety equipment to protect from 1-in-a-million type scenarios. They are able to push through endless regulations but can't manage to assess and promote new technologies in reactor design and waste management to deal with the real problems that do currently exist.
The science and technology is there to make nuclear a great asset. Unfortunately we are stuck with ignorant politicians and public that are driven by smarmy propaganda and hype.