You are using the word “Christian” rather loosely.
True Christians on the contrary are NOT easily swayed by apostates.
True Christians have repented for the forgiveness of their sins and believed in the Lord Jesus Christ, who paid the penalty for the sins of the world, as the Bible says, both in the Old Testament and the New Testament.
You must be born again in order to enter the kingdom of God.
Read John, Chapter 3.
Matthew 24:24 - For there shall arise false Christs, and false prophets, and shall shew great signs and wonders; insomuch that, if [it were] possible, they shall deceive the very elect.