Actually, there is. Many of the most important decisions taken during the two world wars were born out of exactly this. Not least by Churchill himself, in either war, whether it be organising shipping in convoys or in opposing appeasement and the demands for a settled peace in 1940.
It's the footballisation of politics. If you don't support the same things I do then you're one of "them" and as such are my enemy. It's the same logic of why many hardcore Corbynites referred to those of us who voiced criticism of him as "Tories".