Many of them are referring to the so-called audacious claims of Christ that He is God, not believing there’s enough evidence. But this is proven fallacious reasoning because it can be demonstrated that if you won the lottery and just turned on the TV and heard your numbers, you would believe without any further confirmation, that it satisfied your requirements for assurance. If you won the lottery, you wouldn’t be skeptical until the CPA actually certified you ticket, you would celebrate before that! You would’ve trusted the TV as a reliable and credible source of news and info.
But Jesus did that to His disciples when He rose from the dead and appeared to them for 40 days to convince them that He was really risen and not some ghost or imposter. They were so convinced that they became martyrs because of it. This is important testimony in a court of law because people usually tell the truth when faced with death. If they had been consummate liars they probably wouldn’t have been willing to die for it. Most sincere or fanatical men will die for what they believe is true, but not for what they KNOW is false. The disciples had such character that we can count them as credible witnesses and the veracity of their claims.
Any such conspiracy theory will not hold water in light of the truth, because it is unlikely that all the disciples would’ve died for a lost cause. The truth would’ve leaked out before that and the movement wouldn’t have gotten off the ground. The Jewish Pharisee Caiaphas predicted that, if the movement were of God, they couldn’t stop it (they would be fighting God); if not, it would go nowhere nd not get off the ground. Jesus is known as changing the course of history and not as a liar. Actually, the disciple Thomas said that he wouldn’t believe unless he could stick his hand in Jesus side and feel for himself; this was skepticism and doubt but not unreasonable—Jesus accommodated him.
The point is not what Jesus claimed (to be God or not) according to cults or sects but according to mainline Christianity, but the point is moot because it doesn’t affect the answer.