Xmas, ignorance and religious fanaticism

I really can't stand to be corrected. Especially when I'm not wrong.
Today I announced in a text message that "There are exactly five months until Xmas!" The person I was texting responded, "Yep. Christmas." I asked him if he was correcting me. His response? "Yes, I dislike that very much." That, my friends, sent me through the proverbial roof.
I guess the reason this exchange made me so mad was that I have had the conversation before. In fact, last year around Christmas, I listened to a group of people ranting to each other about how much they hate the use of the term "Xmas." They spoke of how it proves that people are forgetting the "true reason for the season" and that the X symbolizes "crossing out Jesus" from the Holiday. Because I was so amused by how self-righteous and ridiculous these people were being, I did not chime in and explain to them what the "X" actually means...
The first two letters of Jesus' name in Greek are Chi Rho (written XP). The chi rho symbol was used by early Christians before the development of the modern cross. It was written that "On this symbol, thou shall conquer." The Romans used simply the Roman letter X. Hence, the abbreviation for Christmas (Xmas) is derived. Therefore, good people, using the letter "X" is not a means of eliminating Christ from Christmas. Rather, it is a valid symbol with Christian origins.
I am Catholic. I attended a private, Catholic school from kindergarten until I graduated high school. And it was not until I moved to the South for college that I realized just how much many of the Protestant religions (namely, Southern Baptists) hate us Catholics. They have a million misconceptions, and rather than finding out the truth, they choose to refer to us as "crazy" and say that we're headed "straight for hell." (I'm not kidding. People have told me this before.) I am not trying to stereotype and say that all Protestants are Catholic haters. I know for a fact that that statement is not true. I am simply speaking from my experience.
I don't care what religion you are. I am Catholic, and no one is going to convert me. But I also will never try to challenge what anyone else believes in regard to religion. I can coexist with other faiths just fine. What I cannot tolerate, however, is ignorance. You do not have the right to condemn other faiths when you don't even fully understand their teachings. Especially since no one here on earth has a say in whether anyone else goes to Heaven or Hell... or wherever else you may believe the afterlife is located.
Let's face it. We're all sinners. No one is perfect. And the fact that you say "Christmas" instead of "Xmas" will not automatically make you right with God. Neither will the fact that you can brag about going to Church every week. Faith is personal. Please, everyone, focus on your own relationship with God, but don't worry about everyone else's.