It's not any sort of "mark of respect"; he's said previously that he regards "Christ" as the given name of a false god.
I don't entirely understand that, because "Christ" is a title equivalent to the Hebrew "Moshiach", not a name, but so be it.
That's part of the reason. Most Orthodox Jews and Noachides will write it as "X-mas," "X-ianity," etc. But as I have explained over and over and over again (and absolutely uselessly, it seems), I prefer not to use the "X" because I think devout chr*stians should be able to use the "X" abbreviation without feeling that they are acting as though ashamed of their faith. So that they may use it with a clear conscience I take a little extra trouble, but apparently baraonda would rather I just write the X. Is that really what everyone wants me to do? Would that make everyone happy?
Okay, but then you'll all start whining that "X-mas" is a politically correct censoring of the holiday's name. Oh well. I tried!