No that is not the point I was making, the point is that it is largely irrelevant what a person wears as to piety. Perhaps you will see it better if I recount a Biblical story found in Luke 18:10-15 (KJV)
Two men went up into the temple to pray; the one a Pharisee, and the other a publican. The Pharisee stood and prayed thus with himself, God, I thank thee, that I am not as other men are, extortioners, unjust, adulterers, or even as this publican. I fast twice in the week, I give tithes of all that I possess. And the publican, standing afar off, would not lift up so much as his eyes unto heaven, but smote upon his breast, saying, God be merciful to me a sinner. I tell you, this man went down to his house justified rather than the other: for every one that exalteth himself shall be abased; and he that humbleth himself shall be exalted.
So Piety is shown by an attitude of heart and mind and a realization we are at best poor deluded sinners and when we have that we are driven to acts of sacrificial service out of thankfulness that is why Jesus when asked what is the greatest commandment said to love the Lord they God with all your heart and what is perhaps pertinent here is that we should love our neighbour as ourselves. To a Christian or Jew the very idea that an act earns merit with God is not part of our way of dealing with God. If we do anything it is only for him and by his empowerment.