Why is it distasteful? Sorry, but I'm missing the point. What's it called if not "joining up"?
I'm not insulting anybody who is in the armed forces or who has relatives in the armed forces.
However, I wouldn't be happy for my own children to be sent off to a war zone, where they would have a high chance of being killed, especially one which had been created by a madman in a Florida holiday home.
If the UK does end up going to war, it will have been one which could have been avoided and the country's involvement will be unnecessary.