Putting politics aside and uniting around the supposed “common good” is dangerous in a time of crisis. It’s precisely in times of crisis that those in power have been most able to act in ways that inflict long-term damage on society in the name of protecting the “national interest".
No, we're not all in it together. Our rulers are responsible for the system that's creating an ecological catastrophe. As that crisis intensifies, it's exposing and intensifying the divide between us and them.