You should really read the whole paper. They even talk about some of the other amazing possibilities these smaller colliders would offer despite being orders of magnitude away from providing anything close to what the paper's title suggests. Also, the authors are all particle physicists and some of them worked on future colliders like the ILC - which was supposed to be built in Japan, but is currently put on hold (practically cancelled) by the Japanese government due to economic reasons. That must have really sucked for them. If you worked with any particle physicists, you'd know that they don't really care much about politics. They wouldn't care more or less about nuclear disarmament than other physicists. But they definitely do care a lot about their experiments.