Islam is not a new enemy to Catholicism. Muslims declared war on the Church nearly 1000 years before the Protestants declared war on Her, and the Crusades to beat back the horde were a constant part of life for centuries.
If, for instance, we are not at war, then why are Catholics and every other Christian denomination claiming a need for “prayer warriors?”
You would not put your family at risk by being unarmed. I understand and concur. And you should not put you and your family at risk of disobeying your bishop.