Jesus in the gospels said he did not know when the end of time would come. The early Church did advise preparing for it could come any moment. Jesus warned of fake Messiahs coming near the end, who he said could lead the very elect astray with their fake signs and wonders. So when he said they could be fooled by the “miracles” he also had the apostles in mind. If you asked him, “If those women/men saw you after you rose from the dead - could they still be taken in?” He would say yes. Like David Hume, Jesus did agree that human nature tends to let itself be fooled with miracle claims. But Jesus lacked consistency and failed to endorse scepticism. Or maybe he lacked integrity. He did mostly banal uninteresting miracles himself and he demanded faith! Take the miracle of the bleeding woman. People were touching him for a cure and he felt power go out and had to search for who he healed. He didn't know for sure until she told him. Also, the story is implausible for many of them would have got a rush of wellbeing as if they were cured. They are not mentioned.
The Gospel of John actually addresses a supernatural rumor that the early Church believed. It was very serious indeed when as difficult as writing was and preserving that writing and getting people to act on it the author had to deal with it. The implication was that the story would stick and corrupt the Church so it had to be refuted. The story was an even bigger one than the resurrection of Jesus in a sense. It was that the beloved disciple of Jesus would never die. Crackpot sects have insisted that the leader would never die which was strange when the leader surely aged, went senile, needed to take to bed and so on. What mentality would it take to want an old man or woman to age forever? Either they were lying that this disciple was still alive and young - meaning he must have been a recluse - or they were insane or both. That aside, there is a massive difference between someone being physically immortal on earth versus a few people reporting private visions of a man returning from the dead. Since Jesus's post-resurrection appearances were occasional and discreet, we are left depending on decades-old hearsay and gospel accounts for "evidence." If Jesus warned that fakes could perform convincing miracles, how do we separate history from rumor?
Jesus implied that massive religious claims need solid mass evidence and then defied that.