It's an annoying symptom of our binary and sensationalist society.
You and have very different views on the principles of nationalism and statehood, but usually are able to debate our points roundly.
Weirdly I think we are often arguing for similar outcomes - just completely different methods of delivery!
Although we also occasionally fall into the stereotypes that modern media had created.
Nationalism = fascism is a lazy and easy headline; like the people throwing racism around casually etc.
I always say be wary of easy answers - too many people are too lazy/ignorant/conditioned (delete as appropriate!) to look at detail and opposing positions.
Unfortunately that a bit reason why the Corbyn part of labour is destructive - many of their ideas and principles are appealing, however they have to understand they need to operate in a global, capitalist world - because it isn't going away overnight, irrespective of how they feel about it.