Yea.. because the word 'pagan' means the festival wasn't religious....
Point taken, but what I meant is that christians adapted a festival dedicated to Cybele into a holiday dedicated to the resurrection of Jesus. It's always been religious, but it originally served a completely different purpose than it does now. Christians repurposed a festival to a completely different goddess into a holiday for their lord and saviour because the time frame sort of coincided and there was conflict between the pagan worshippers and the christians in christianity's early years, so while the christians initially tried to abolish the festival they adapted it to their own purpose as a compromise.
To the victor goes the spoils, I guess.