Is Christianity based on older myths?

[Mister Agenda]

Mithras, Osiris and the rest are just myths and were understood as such by their adherents.

That seems a stretch, and unknowable to boot. No doubt some adherents viewed their deities as mythical, just as some people in Christian pews and in front of them in America do today. The average person probably took the stories a little more literally, the way the average American Christian does today.

Jesus Christ, on the other hand, was a real person and the early Christians knew that.

'Believed that' is not synonymous with 'knew that'.

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You all make a logical fallacy by assuming that just because previous examples of something had X then all subsequent examples must also have X.

That seems rather imperceptive. Do you believe that is our position just because it's more convenient to your position if it is?

Just because the previous religions were false doesn't mean that Christianity is also.

That is correct. It just means Christianity isn't very orginal.

The pattern is broken.

No two stories are exactly like, but the pattern is similar. Especially if you consider more contemporary wandering philosopher/wonderworkers like Apollonius of Tyana and the Simon of the 'Gabriel Revelation' tablet.

The charge isn't that Christianity isn't true based on these similarities, it's that it isn't impressively unique, which is a frequent claim of Christian apologists.

The examples I gave, Mithras and Osiris, were both mystery cults whereas Christianity was/is not.

So? There were plenty of pagan religions that weren't mystery cults. I can think of some examples off the top of my head that were believed to be real people who really walked the earth and were considered actual gods after their death: Aesculapius (son of Apollo and a mortal woman), Heracles, Amenhotep (a healer), and Imhotep (another healer).