Many Christians don't know how to explain salvation

Refer to the following Youtube clip (RSS activist posing as a pastor) to see the conversation between two Malayalees [i.e. a Christian named Binu conversing with and exposing a RSS activist (Hindu nationalist) named Manu, posing as a pastor].

As I saw this clip, I was reminded how regarding the topic of salvation, many Malayalee Christians (as well as Christians from other races) don't know how to explain salvation to others, especially the critics/enemies of Christianity. When the RSS “pastor” asked Binu regarding what Jesus saved him from, I was expecting a good answer. However, his answer stopped at Christ's life being taken on the cross. Then he jumped to accusing the RSS “pastor” of not knowing the answer to his own question and that's why he's engaging in such wicked behavior (posing as a pastor to deceive people). Not trying to troll Binu, but I've come across plenty of Malayalee Christians who can't explain salvation to others. The central point in explaining salvation to others (especially the critics/enemies of Christianity) hinges on Romans 7:4-25 and Romans 8:1-14 which talk about one's sinful nature [and its consequence of death, both physical and spiritual types. By spiritual type, I mean an eternal separation from God in the lake of fire and burning sulfur after the physical death (the first death). Refer to Revelation 20:6,14]. Only Christianity addresses the solution to one's sinful nature and death. No other religion addresses the solution to one's sinful nature and death. All other religions may emphasize that we must do good and abstain from evil, but they don't address the solution to the sinful nature (which is what prevents us from behaving righteously). What is the point of telling people that they need to do good and abstain from evil when they can't find the strength in themselves to do this? The solution to the sinful nature and death (i.e. putting an end to its control over us) was God giving His Son, Jesus Christ, as a sacrifice for our sins (refer to Romans 8:3-4), so that we would no longer follow our sinful nature, but instead follow the Holy Spirit, who guides us and empowers us to live righteously which leads to eternal life (refer to Galatians 5:16-26; Romans 6:22 and Galatians 6:8). Only the Holy Spirit can resurrect believers who have gone through the first death, so that they may enjoy eternal life in God's new Kingdom.

Romans 7:24-25 (NLT):
Oh, what a miserable person I am! Who will free me from this life that is dominated by sin and death? 25 Thank God! The answer is in Jesus Christ our Lord. So you see how it is: In my mind I really want to obey God’s law, but because of my sinful nature I am a slave to sin.

Romans 8:1-4 (NLT):
So now there is no condemnation for those who belong to Christ Jesus. 2 And because you belong to him, the power of the life-giving Spirit has freed you from the power of sin that leads to death. 3 The law of Moses was unable to save us because of the weakness of our sinful nature. So God did what the law could not do. He sent his own Son in a body like the bodies we sinners have. And in that body God declared an end to sin’s control over us by giving his Son as a sacrifice for our sins. 4 He did this so that the just requirement of the law would be fully satisfied for us, who no longer follow our sinful nature but instead follow the Spirit.

Romans 8:1 (authorized KJV):
There is therefore now no condemnation to them which are in Christ Jesus, who walk not after the flesh, but after the Spirit.

Refer to my Google Plus post for a video regarding this subject also:
The difference between genuine Christianity and other religions

Refer to my other Google Plus posts also:
The difference between Christianity, Judaism, and Islam

The foolish logic of a Muslim critic of Christianity

Is there parallelism between Christianity and Hinduism?

All Christians must have God's word ready to come out of their mouth like a sword when faced with challenges to their faith (refer to my post God has given us a sword which comes out of our mouth).