I would take this up with the Bishop. The Church (not the Pastor) has the authority to deem the norms for Mass. She has deemed that the Creed (or appropriate subsititute ala renewal of Christian vows during a baptism incorporated into the obligatory Masses). The reason is that the entire Church is gathered and they are professing the Faith together. Daily Masses are not required of the entire faithful so it less appropriate to say the common “pledge.” Your Pastor is correct: It is like the Pledge of Allegiance. I wonder why he has a problem with you making such a pledge?
From the GIRM:
The Profession of Faith
- The purpose of the Symbolum or Profession of Faith, or Creed, is that the whole gathered people may respond to the word of God proclaimed in the readings taken from Sacred Scripture and explained in the homily and that they may also call to mind and confess the great mysteries of the faith by reciting the rule of faith in a formula approved for liturgical use, before these mysteries are celebrated in the Eucharist.
- The Creed is to be sung or said by the priest together with the people on Sundays and Solemnities. It may be said also at particular celebrations of a more solemn character.
If it is sung, it is begun by the priest or, if this is appropriate, by a cantor or by the choir. It is sung, however, either by all together or by the people alternating with the choir.
If not sung, it is to be recited by all together or by two parts of the assembly responding one to the other.