Patriotism to me seems like a weird label for anyone to use regardless of the country they live in. When you think about it, assuming we go by the actual definition of "loving your country", almost everyone is patriotic. There's no way you can't be. Even if your average Joe is not an activist or think about politics too much, (s)he still possesses certain beliefs in day-to-day life that stem from patriotism: the desire on live a happy life (on their country's soil), the desire to have civil liberties, to have a strong economy, etc. Something as simple as the pleasure you get from visiting certain locations within your area would be part of your patriotism. Really the only way you can't be patriotic is if you possess radical beliefs and/or perform radical actions (i.e. serial killers, terrorists, etc.).
Like everything else, context is everything. Most of the time when people bring up the topic of patriotism, what they're really talking about is blind patriotism. The idea often pitched is that if you criticize your country in any way or don't agree with the customs and cultures currently in place, you're unpatriotic. It's not only silly, but weird to even have the word "patriotism" attached to this idea. If you actually love your country, you should criticize it and aim to make it better.
Thus if we go by the actual definition of patriotism which is "love for your country", I'd say it's not only reasonable but normal. But if we go by what people are actually referring to in 99% of cases, I'd say it's a toxic mentality that needs to die.