Against late punctuation: the claim is unhistorical, suspicious in time, object, authors, and witnesses
Besides: (1) The claim is destitute of historical credit. For if the Masoretic correction and perfection of the points had been made after Jerome's time, as they will have it, some mention of so great a deed would doubtless have been inserted somewhere by the holy fathers — especially by Jerome's disciple-bishops who lived in the East skilled in Hebrew. How great the contests were over the version of the Seventy, Symmachus, Aquila, Theodotion, Jerome, Luther, Piscator, and Castalio is all too well known.
(2) It is suspicious as to time, object, authors, and witnesses. The time is after the New Testament canon was complete, when that Masoretic work is said to have been done — after which, since beforehand neither the Apostles nor their apostolic followers nor those who delivered it to the Church doubted even slightly about itly say that anyone either could or would have attempted so great a crime. The object — namely the biblical codex — was so sacred to the Jews that writing upon it was like a sacrilege. The authors would be rabbis, either bad or good. If bad, perhaps the canon's integrity will waver. If good, they would rather have died than add even a jot to the text. The witnesses are rabbis, whose faith is rather shaky, and they do not agree among themselves, as Münster testifies.
Latin
Praeterea 1. Assertio fide historiae destituta est. Si enim Masoretica correctio & perfectio punctorum post Hieronymi tempus, ut volunt, facta fuisset, tanti facti proculdubio a sanctis patribus aliqua mentio alicubi injecta fuisset, praesertim ab Hieronymi discipulis episcopis qui in oriente vixerunt linguae Hebraeae peritis. Quantae contentiones fuerint de versione LXX, Symmachi, Aquilae, Theodotionis, Hieronymi, Lutheri, Piscatoris, Castalionis, nimis notum est. 2. Suspecta est, quod ad tempus, quod ad objectum, quod ad auctores, quod ad testes. Tempus est post completum canonem N.T., quo dicitur factum illud opus Masoreticum, post quod, cum antea de illo neque Apostoli neque viri Apostolici neque eorum sectatores quorum manu Ecclesiae traditus est vel tantillum dubitarunt, quenquam tantum facinus moliri vel potuisse vel voluisse haud facile dixerim. Objectum, nimirum codex Biblicus, Judaeis tam sacrum erat ut scriptio ad illud facta piaculi instar esset. Autores Rabbini fuerint, iique mali aut boni. Si mali, forsan dexteritas canonis vacillabit. Si boni, mori maluerint quam vel iota textui adjicere. Testes sunt Rabbini, quorum sublestior fides est, & inter se non consentiunt, teste Munstero.