Christians believe that:
- There is one God, who created everything in the universe, and He is perfect -- He has never done anything bad. He is also eternal -- that means He was alive before anything was created, and will be alive forever.
- All people (including Christians) break God's rules, and so all of us are evil.
- There's no way for people to be good enough to please God by themselves.
- Because we're all bad, and God is good, we all deserve to be punished. So when we die, we are going to be judged, and we will punished for eternity for breaking God's rules.
- But people are God's creation, and He loves every single one of us on Earth, so He does not want anyone to be punished when they die. God is a perfect Father, who loves His children, and wants them. So, He made a way out of the punishment for us: He sent His only Son, Jesus Christ, to be born as a human being, and live among us. Jesus was the only person in history to ever live a perfect life, without doing anything wrong. God sent Him to be punished instead of us, so that everyone who trusts in Jesus, and wants to stop doing bad things, can be saved from God's punishment.
This means you will get to be with God, forever in heaven when you die.
- God will help that person who trusts in Jesus to stop being evil, by filling him or her with His Holy Spirit.
Christian missionaries in India don't want to change your government. They want your heart to be changed by believing in Jesus Christ, and trusting only in Him as your Savior, so that you don't have to suffer punishment when you die, and you can be a friend of God because of His gift.
In fact, Christians believe we need to obey the human government and do what it says, whether we are in India or anywhere else-- unless it is different than what God says for us to do.
Christians are supposed to be peaceful and they want to bring you Jesus's love. If you are seeing missionaries that are not acting like that, then they are going against what God tells us in our Bible, and you should stay away from them. Otherwise, please consider their message.
There is no conspiracy. In the West, we help fund Christian missionaries in India and other parts of the world because we truly believe that Jesus is the Son of God, and you need to believe in Him to get to heaven. We love God, and we love you, and we want all people in the world to go to heaven.
Source: The Bible - https://www.bible.com/hi/bible/819/jhn.1.hhbd