Christians understand the falling away because Jesus told us about it. The secular world doesn’t see it for what it is, they see it as the opposite of what it actually means.
They are being deceived, Jesus told the world not to be deceived. If you choose to be that’s your God given free will choice.
The Bible indicates that there will be a great apostasy during the end times. The “great apostasy” is mentioned in 2 Thessalonians 2:3. The KJV calls it the “falling away,” while the NIV and ESV call it “the rebellion.” And that’s what an apostasy is: a rebellion, an abandonment of the truth. The end times will include a wholesale rejection of God’s revelation, a further “falling away” of an already fallen world.
2 Thessalonians 2:3
King James Version
3 Let no man deceive you by any means: for that day shall not come, except there come a falling away first, and that man of sin be revealed, the son of perdition;
Jesus warned the disciples concerning the final days in Matthew 24:10–12: “At that time many will turn away from the faith and will betray and hate each other, and many false prophets will appear and deceive many people. Because of the increase of wickedness, the love of most will grow cold.” These are the characteristics of the great apostasy of the end times.
Matthew 24
4 And Jesus answered and said unto them, Take heed that no man deceive you.
5 For many shall come in my name, saying, I am Christ; and shall deceive many.
6 And ye shall hear of wars and rumours of wars: see that ye be not troubled: for all these things must come to pass, but the end is not yet.
7 For nation shall rise against nation, and kingdom against kingdom: and there shall be famines, and pestilences, and earthquakes, in divers places.
8 All these are the beginning of sorrows.
9 Then shall they deliver you up to be afflicted, and shall kill you: and ye shall be hated of all nations for my name’s sake.
10 And then shall many be offended, and shall betray one another, and shall hate one another.
11 And many false prophets shall rise, and shall deceive many.
12 And because iniquity shall abound, the love of many shall wax cold.
13 But he that shall endure unto the end, the same shall be saved.
14 And this gospel of the kingdom shall be preached in all the world for a witness unto all nations; and then shall the end come.
That’s the difference between knowing what the whole Bible says, not a few cherry picked verses.
