Language is all about comparing one thing to another, and frequently about exaggerating. People call things 'very unique' (something can't be more one-of-a-kind, it either is or isn't), movies ads call one movie after another 'the biggest movie of the year', and generally people just abuse language. The one I hate the most is figuratively vs. literally. I'm figuratively going to kill the next person I hear doing that, literally! (See, doesn't that sound much more emphatic?)
Describing things as war is just part of language. Phrases like 'love is war' have been around forever (forever? since dinosaur times?) We've had wars on poverty and wars on Lyndon Johnson's war on poverty. Political parties and news organizations have 'War Rooms'. These people aren't trying to be disrespectful. All they are doing is reusing a tired worn out metaphor that is as cliche as ice cream on a summer day. (That has a nice ring to it doesn't it, 'cliche as ice cream on a summer day.' Maybe we can turn that into a new tired worn out cliche.)
The Gennie is out of the bottle on this one. (Oh no! Another cliche. They are everywhere.)