Why do people replace the word Christmas into X'mas?

To me the X is like a cross because it can be adjusted to look like a cross, and also because the two lines of the X cross. Maybe instead of abbreviating with an X we should abbreviate with a cross. Either way, I don't see that it disrespects Christ at all because we all know what the holiday season is about, is for. I think "X" was adopted with the hype of materialistic goods for Christmas.

I think that originally it was used by atheists and agnostics and those who do not believe that Christ was born in December. It is was used in holiday home decorations and other things that would keep these people from having to declare their beliefs and argue endlessly over them with believers because their houses were undecorated for the holiday season. More and more commonly you see it though. I believe that even if Christ was born at some other date in history which is 364 times more likely than that he was born on December 25th, this is the accepted date for the observance and celebration of the occasion. If you ask a child who we are celebrating Christmas for they would more likely respond, "Santa Claus" than Jesus Christ.