Is it undesirable to wipe the neck during the Wudhu as I have heard that it resembles the Jews?
Yes, it is not recommended nor is the wiping over the neck legislated. For indeed the wiping المسح (during the ablution) is for the head and the ears only, as the Book and the Sunnah are proof upon this.
Shaykh `Abdul-`Azeez Bin Baz
مجموع فتاوى و مقالات متنوّعة, Volume 10, Page 102.