Why do extreme Christian groups stock pile food and water for the end of the world?

You correctly identified the extremist ideas of the mormons!

Compare the bible and christian beliefs with the mormon book and beliefs and it is as plain as day that mormons only claim to be christian because they are afraid to stand up as an entirely separate religion!

Before that happens, and as a Christian I do not believe it will in the "left behind" theory, there will be great upheavals and storms, earthquakes, hurricanes, and destruction. having a food supply even to protect you when you lose employment, is always a good idea.

It has to do with the ecomy and not the end of the world !!! Some say that next month there will be some kind of economy shakeup !!! Are you prepared !!!

1.Jesus claimed to be God - John 8:24; 8:56-59 (see Exodus 3:14); John 10:30-33

2.Jesus is called God - John 1:1,14; 20:28; Col. 2:9; Titus 2:13; Heb. 1:8

3.Jesus is the image of the invisible God - Heb. 1:3

4.Jesus abides forever - Heb. 7:24

5.Jesus created all things - John 1:1-3; Col. 1:15-17

6.Jesus is before all things - John 1:1-3; Col. 1:17;

7.Jesus is eternal - John 1:1,14; 8:58; Micah 5:1-2

8.Jesus is honored the same as the Father - John 5:23

9.Jesus is prayed to - Acts 7:55-60; 1 Cor. 1:2 with Psalm 116:4; (John 14:14)

10.Jesus is worshipped - Matt. 2:2,11; 14:33; John 9:35-38; Heb. 1:6

11.Jesus is omnipresent - Matt. 18:20; 28:20

12.Jesus is with us always - Matt. 28:20

13.Jesus is our only mediator between God and ourselves - 1 Tim. 2:5

14.Jesus is the guarantee of a better covenant - Heb. 7:22; 8:6

15.Jesus said, "I AM the Bread of Life" - John 6:35,41,48,51

16.Jesus said, "I AM the Door" - John 10:7,9

17.Jesus said, "I AM the Good Shepherd" - John 10:11,14

18.Jesus said, "I AM the Way the Truth and The Life" - John 14:6

19.Jesus said, "I AM the Light of the world" - John 8:12; 9:5; 12:46; Luke 2:32

20.Jesus said, "I AM the True Vine" - John 15:1,5

21.Jesus said, "I AM the Resurrection and the Life" - John 11:25

22.Jesus said, "I AM the First and the Last" - Rev. 1:17; 2:8; 22:13

23.Jesus always lives to make intercession for us - Heb. 7:25

24.Jesus cleanses from sin - 1 John 1:9

25.Jesus cleanses us from our sins by His blood - Rev. 1:5; Rom. 5:9

26.Jesus forgives sins - Matt. 9:1-7; Luke 5:20; 7:48

27.Jesus saves forever - Matt. 18:11; John 10:28; Heb. 7:25

28.Jesus discloses Himself to us - John 14:21

29.Jesus draws all men to Himself - John 12:32

30.Jesus gives eternal life - John 10:28; 5:40

31.Jesus resurrects - John 5:39; 6:40,44,54; 11:25-26

32.Jesus gives joy - John 15:11

33.Jesus gives peace - John 14:27

Rom 5:8 But God commendeth his love toward us, in that, while we were yet sinners, Christ died for us.

1John 1:8 If we say that we have no sin, we deceive ourselves, and the truth is not in us.

1John 1:9 If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness.

Rom 10:9 That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved.

Rom 10:10 For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation.

Mat 10:32 Whosoever therefore shall confess me before men, him will I confess also before my Father which is in heaven.

Dear Jesus,

I admit that I am a sinner before you Lord,, deserving of Hell. Please forgive me of my sins. I now believe upon You alone, and not my self-righteous works and religion. Thank you Jesus for the salvation you have given me. Amen.

Not all of them -- there's pre- Tribulation and mid- Tribulation and Post-Tribulation believers. Like the rest of Christianity, there are a dozen sects who believe different things.

I think others who are not Christians do this too. I would rather think that they are waiting for a catastrophic event in which many people die but some are still living. I think everyone should be prepared for that.

Post-tribulation parousia vs. Pre-tribulation parousia.