It was not a "suicide cult". You are ignoring the fact that Peter denied Jesus three times, and this is the man that we have been given the keys to Heaven through the Holy See. Why would Peter, of all the apostles, suffer martyrdom if he did not witness the resurrected Christ? You are playing with these ideas in your head as if they are fiction. All of the apostles were real people, and you are taking them for profoundly stupid ignoramuses. Even further, Peter had to be given a prophecy by the Lord Himself in order to comprehend the gravity of his rejection. This is the cocks crowing three times. Do you think that if Peter were not given this prophecy, that he would believe in the risen Lord? There is also zero benefit for eleven men to commit to a suicide pact to enrich the cause of a dead man. What is the benefit? Notoriety? How could these men predict whether they would attain notoriety or not for dying for such a cause? And what value does this have to dead men? I would not submit to martyrdom for notoriety. You have to be stupid to do this. These men did not want notoriety for such a cause, and this much is obvious. If they wanted notoriety, then at least one of them would deny the divinity of Christ to save his own life. The value of notoriety for the dead is zero. People do not work for nothing.
If you want to reject the historicity of the Bible, then fine. Do what you want. Go have faith in empty things and die an empty man.