Joseph,
Again, you are getting too carried away with your Wiki research. As per Halacha leMaisah it has been pointed out that even on xmas its muttar.
Now, as your comparison to xmas, (and as pointed out by Ubiq), there is certainly a difference. And it’s simple – ask any random person “celebrating” Halloween , why or what they are celebrating, their reply will be its just a simple “party” kind of Holiday, although it has been originated by the church/Celtics/pagan and still has some connection, it has been assimilated by all races and religions in the USA as a “party night” (quoting your Wiki אות קט”ז ). Therefore is within the above mentioned category:
אֵין יוֹם הֶחָג אָסוּר אֶלָּא לָעוֹבְדִים בּוֹ בִּלְבַד, אֲבָל הָעוֹבְדֵי כּוֹכָבִים שֶׁשְּׂמֵחִים בּוֹ וְאוֹכְלִים וְשׁוֹתִים וּמְשַׁמְּרִים אוֹתוֹ מִפְּנֵי מִנְהָג אוֹ מִפְּנֵי כְּבוֹד הַמֶּלֶךְ, אֲבָל הֵם אֵינָם מוֹדִים בּוֹ, הֲרֵי אֵלּוּ מֻתָּרִים לָשֵׂאת וְלָתֵת עִמָּהֶם
I suggest you study Avoda Zara to get acquainted that not all acts and holidays are the same.