Peter, faced with the fact of the resurrected Christ, did not care about the threats of the earthly authorities and faced imprisonment and excecution more than once, ultimately being martyred because he would not deny his Lord.
The disillusioned Peter who saw his rabbi railroaded and executed, and had no idea that his grave would be empty a few days later, is no example for Christians to emulate.
I wouldn't automatically consign anyone to hell for lying about his faith, but Christian persecution under Islamic rule isn't terribly different from Christian persecution under Roman rule, and one of the great early controversies of the Church was over how to deal with the tratidores who denied the faith to save their necks.
Mat 16:21 From that time forth began Jesus to shew unto his disciples, how that he must go unto Jerusalem, and suffer many things of the elders and chief priests and scribes, and be killed, and be raised again the third day.
Mat 16:22 Then Peter took him, and began to rebuke him, saying, Be it far from thee, Lord: this shall not be unto thee.
Mat 16:23 But he turned, and said unto Peter, Get thee behind me, Satan: thou art an offence unto me: for thou savourest not the things that be of God, but those that be of men.
I wouldn't automatically consign anyone to hell for lying about his faith, but Christian persecution under Islamic rule isn't terribly different from Christian persecution under Roman rule,
Christians presently in free countries do not meet in catacombs.