This will likely depend on the status of those non-Jews: are they more like missionaries trying to convert Jews, or like non-Jewish printers who lack intent for kedusha.
The distinction starts with a gemara (Gittin 45b) that distinguishes between a heretic and a "regular" gentile
Rav Naḥman says: We have a tradition that a Torah scroll that was
written by a heretic should be burned; a Torah scroll written by a
gentile should be interred; a Torah scroll found in the possession of
a heretic, and it is not clear who wrote it, should be interred.
(see also MT Mezuza 1:13)
As a result of this, we find different rulings from modern authorities.
R Shlomo Riskin is reported to have ruled you should burn bibles printed by missionaries (likely referring to Old and New Testaments)
I met with Rabbi Riskin last week [...] and he mentioned that several
years ago the residents of Efrat received missionary bibles in the
mail - as part of a campaign to convert Jews - and he poskened that
people should burn them (the missionary materials, not the
missionaries).
R Yaakov Ariel however (quoted here) argues
a heretic today who publishes a book does not work the printing press.
Even if he did, printing is no longer a manual process and the machine
would do the printing, not the person. Therefore, the heretic’s intent
does not affect the published books. However, problematic books should
be removed from circulation and buried separately from sacred books.
In your case, since these non-Jews are not heretics per see and aim to encourage Jews to be more learned, my sense is that you should bury them separately, but of course consult your rabbi
before implementing anything you learn here.
