When Beliefs Collide

So I know it has been a while, we have been battling stomach virus and chronic headaches, but hopefully I am back and in full swing.  For the better part of this afternoon, I have been in an argument with fellow Christians about the holidays.  Apparently, we are wrong for celebrating the holidays, especially Halloween, because of its roots in paganism.  This argument never even existed when I was a child, because everyone just dressed up silly and went to get candy.  These days, if you celebrate, then you are condoning the supposed dark nature of Halloween.  The fact that we don't celebrate  for those reasons was a mute point to some people.  Also, the issue of Christmas came up briefly and again we shouldn't celebrate because of paganism.  We don't teach our children that xmas is Jesus' birthday, because there is just not evidence to support it in the Bible and the Bible is our instruction manual.  However, we are apparently supporting paganism by allowing our children to believe in Santa.  Throw stones if you must, but I know it is a lie, but on the other hand, I still believe.  Let me explain...there have been Christmases that we didn't know if our kids would even have a Christmas, but shortly before, something would happen to enable us to provide it.  This is the Santa I believe in and that we tell our kids about.  Whether it is that unexpected money from your boss or someone else or just other people, it was unexpected and it was toys the kids normally wouldn't have gotten...therefore, it WAS Santa.  We have also helped others and asked not to be revealed...just tell them it's from Santa...is this so wrong???  Santa is whatever makes him Santa in your life...the fat guy in a red suit is just a personification.
     So, we dress up and get candy on Halloween...but nothing else, no rituals or anything.  We believe in Santa Claus...our version of him.  My question is, is this wrong ACCORDING TO THE BIBLE or are people just trying to make it wrong to suit their needs.   I have studied the Bible my entire life and have never found it specifically say that these things are wrong.  It does speak out against witchcraft and various other sorceries and sins, but it refers to those who practice such things.  If you aren't practicing such things, where is it a sin??

Have a great day!!