Does God take out disobedient Christians? Yes

 QUESTION RECEIVED:

If our sins are forgiven why can Christians still die because of their behavior?
Romans 6:23 New King James Version (NKJV)

23 For the wages of sin is death, but the gift of God is eternal life in Christ Jesus our Lord.

All living created creatures die. (Enon is the exception.)

God will renew His creation one day.

I think you are asking is  - Can Christians still die because of their behavior?

Yes Christians can die as martyrs.

Also Christians can die because of disobedience.

I will deal with how we can die in disobedience.

Yes when we are saved our sins are atoned for.

We need atonement because of our horrible sins.

The sinless God/man Jesus Christ died on the cross and was resurrected.

God placed the sin of all who would believe on Christ at the cross.

We sinners who would repent and are declared righteous before the sight of God and are forgiven and become citizens of Heaven.

We are justified by the blood of Jesus. 
We are still growing in sanctification. 
Much of sanctification is a choice. 
We must choose to live the gospel life in worship, Word, prayer and action. 

Christians can sin and that can lead to death.

1 John 5:16-17 (NKJV)

16 If anyone sees his brother sinning a sin which does not lead to death, he will ask, and He will give him life for those who commit sin not leading to death. There is sin leading to death. I do not say that he should pray about that. 17 All unrighteousness is sin, and there is sin not leading to death.

In Acts 5:1-11 you can read the story of Ananias and his wife Sapphira. 
They both dropped dead as they lied to the Holy Spirit in withholding a pledge of property to the early church.

The sin that leads to death is not listed.

It appears the sin leading to death deals with behavior directly against the Holy Spirit in blatant defiance to His work and purpose.

Below Paul writes about how in a lack of reverence to the Lord church members have died because of their behavior in communion.

1 Corinthians 11:29-3030

New King James Version (NKJV)

29 For he who eats and drinks in an unworthy manner eats and drinks judgment to himself, not discerning the Lord’s body. 30 For this reason many are weak and sick among you, and many sleep. 31 For if we would judge ourselves, we would not be judged. 32 But when we are judged, we are chastened by the Lord, that we may not be condemned with the world.

33 Therefore, my brethren, when you come together to eat, wait for one another. 34 But if anyone is hungry, let him eat at home, lest you come together for judgment. And the rest I will set in order when I come.

The gift of salvation is freely given.

The gift is not valueless.

The gift is priceless.

You have a responsibility when you become part of the Kingdom to serve your King.

Romans 6:23

23 For the wages of sin is death, but the gift of God is eternal life in Christ Jesus our Lord.