Are all people of Scripture unjust for not believing in the Quran according to [29:46]

Sahih International translation of [29:46]: >And do not argue with the People of the Scripture except in a way that is best, **except for those who commit injustice among them**, and say, "We believe in that which has been revealed to us and revealed to you. And our God and your God is one; and we are Muslims [in submission] to Him." Word used here is ظَلَمُوا۟. Another word with same root is used in another place in a way similar to *"those who sin have commited injustice to themselves"*. Therefore not believing in Qur'an is unjust meaning there can be no just person of book/scripture. **Is the injustice in 29:46 a specific form? is there any tafseer on this?** Remember that prefix "al-" is not used in 29:46. The prefix "al-" means "The" for example "al-Malik" means "The King" .