Nope.
This is what the Christians of the first century believed:
Here is a selection from chapter 16 of the ninth Similitude of the Shepherd of Hermas (early second century):
They were obliged,” he answered, “to ascend through water in order that they might be made alive; for, unless they laid aside the deadness of their life, they could not in any other way enter into the kingdom of God. … For,” he continued, “before a man bears the name of the Son of God he is dead; but when he receives the seal he lays aside his deadness, and obtains life. The seal, then, is the water: they descend into the water dead, and they arise alive. And to them, accordingly, was this seal preached, and they made use of it that they might enter into the kingdom of God.” (Shepherd of Hermas)
and this:
Here is a selection from the eleventh chapter of the Epistle of Barnabas (A.D. 130) describing baptism:
“This means that we go down into the water full of sins and foulness, and we come up bearing fruit in our hearts, fear and hope in Jesus and in the Spirit.”
and this also:
Next consider the second century bishop of Lyon, St. Irenaeus (b. 115-130, d. around 200 AD). In his work titled Against Heresies, he writes,
And when we come to refute them [i.e. those heretics], we shall show in its fitting-place, that this class of men have been instigated by Satan to a denial of that baptism which is regeneration to God, and thus to a renunciation of the whole [Christian] faith. (A.H., I.21)