Why do Christians see Halloween as bad but Christmas as good?

In lame man terms, Halloween is not about dying but about keeping away evil spirits. Jesus wasn't born on Christmas day, Christmas has to do with the change in season. BOTH are Pagan celebrations (they believed in multiple gods). Why is one ok and the other one not? If Halloween is unexceptionable by Christianity then they shouldn't be celebrating Christmas.

Why do Christians see Halloween as bad but Christmas as good?
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