BS”D
I use notzri and notzrus whenever I can (check my comments here and on the main page).
Online I wish people who I do business with in English “happy holidays”; here there is no problem with the traditional Russian language greeting as it is just “To the upcoming (holidays or New Year)”. As for Jews who don’t agree with me, I use the same greeting every day of the year and that is of course the Creedmoorer segile of “Shygetz Aross”.