To lighten the discussion (I hope), let me say that the presence of weapons usually does not imply any kind of violence. When it comes to defending the defenseless, the mere presence or possibility of presence of the weapon is generally sufficient to forestall actual violence.
So the priest might be blessing non-violence, as symbolized or indicated by the many weapons, which reduce the incidence of violence.
The Church does not bless violence, thank God! And she can penance those who have committed acts of violence, even when the violence appears to have been "justifiable."
Lest someone imagine that the Church is "warlike." War is reserved for parish council meetings and persecution is reserved for when the priest loses a receipt...