“Then what did Christ expel? Did He lie? Are the Gospels lies?”
There are a lot of things that Christ did that you can’t do.
I never said I was Him, nor did I claim His powers.
So, that Red Herring is gone.
With that taken care of, let's get back to the original question then (unless you want to throw the train off the track again and talk about foot fungus or something).
Did Christ, or did He not, expel many demons on multiple occasions in the Gospel accounts?
The answer is "yes" - and that is evidence that demons are real, and they exist. The four Gospel accounts are the most significant historical documents in all of human history.