What makes your faith true?

[Fake Messiah]

I think my faith is true because of the life and death of Jesus, how quickly Christianity was able to spread during a time with no communication or transportation technologies, the fact that Jesus's 12 friends believed so strongly that He was God that they all were willing to die horrible painful deaths for it, the miracles of the Saints (particularly the Fatima sun miracle), the fact that it really does just make sense to me, and probably most importantly of all: having had my own supernatural experience which pointed directly to Christianity because it involved the Virgin Mary.

So how does believer in Virgin Mary explain the part described in Mark 3:21 where she and Jesus' brothers thought he was possessed by demons. They even journeyed from Nazareth to Capernaum to take him away and then Jesus denounced her. I mean she acted as if she didn't believe her son was god, but a crazy man.

I think those are not real reasons but you rather see them as miracles because you didn't think it trough and as such is prone to see "miracles" just as UFO believers see alien spaceships, ghost believers see ghosts and so on.
Do you not think there could be additional evidence that could prove this was a nonsense like the so called Fatima miracles? Do you not think you should investigate it better? Like  investigator Joe Nickell reports that girl Lucia's own mother said that she was "Nothing but a fake who is leading half the world astray." Friar Mario de Oliveira, who knew her well, described her as living in a "delirious world of infantile fantasies" and suffering from "religious hallucinations". There are alternate explanations for the children's stories, imagination and boredom being chief among them.
If we look at the photo of the event there is nothing that looks unusual. Could people not be fueled by having spent many happy hours as a child laying on my back and staring directly at the sun and also most of the people reported that they saw nothing unusual.