This is so typically bloody English.
When the Ivory Coast qualified for the World Cup, both sides of that country's bloody civil war declared a truce in celebration. A civil war in Nigeria was put on hold so that people could watch the legendary Pele play. In Nazi-occupied Ukraine, FC Start refused to give the occupiers an easy propaganda match and made martyrs of themselves by whopping their oppressors 5-3.
The English wring our hands and worry about whether flying our flag is appropriate.
Okay, for those wondering:
Yes, it is bloody appropriate.
This is the World Cup. The most watched sporting event in the world, ever, anywhere, at any time. To even qualify is a victory. To do so consistently, tournament after tournament, is a triumph.
Fly your flag with pride.