Is working in public facility protection in Europe permissible or forbidden, given the possibility of sometimes being forced to protect bars?

Every place that is based on a lawful activity, such as permissible trades and transactions, there is no harm for a Muslim to work in it and protect it. As for every place that is based on disobedience to Allah Almighty, such as places of immorality, selling alcohol, and usurious banks, it is not permissible for a Muslim to work in them or guard them; because that involves condoning evil and assisting in sin and transgression.