If you can be concerned without it affecting your daily mood, I would answer yes. If your disposition doesn't allow for that kind of detachment, I'd say there's still plenty of time for concern later.
Unlikely, France and the UK have nukes (yes, the UK is not in the EU). They will just attempt the same playbook in Europe. In fact, Elon is already at it in Germany and the UK.
Should I be concerned that they may break all treaties and engage in biological warfare with the EU?