Conspiracy theories are very popular in our world, and generally speaking, people tend to fall on one of two extreme ends of a spectrum regarding them. The first is gullibility. Some people will fall for any conspiracy theory that has 10 views on YouTube, up to and including the strange idea that all world leaders are actually alien reptiles seeking to dominate the earth. On the other hand, there are those who have been conditioned to automatically reject anything that has been labelled a conspiracy theory, regardless of evidence.
What about Christians? What should we think of conspiracy theories? In truth, it depends on the theory. The first thing to note is that conspiracies can happen. Indeed, not only do we have examples of them in the Bible (see, for example, David's conspiracy to kill Uriah in order to cover up his affair with Bathsheba), up to and including the conspiracies to kill the Lord Jesus Christ, and even stop news of His resurrection from spreading. On top of that, conspiracies have been shown to have happened throughout history. Some failed, such as the famous Watergate Scandal. Others succeeded, such as Hitler's bid for absolute power. Therefore, as Christians, we do need to be open to the possibility of conspiracy.
On the other hand, we are to be absolutely critical of any and all conspiracy theories that pass by us. In 1 Thessalonians 5:21-23, we are told to test all things, holding on to that which is good, and avoiding that which so much as takes on the appearance of evil. When a thing is provably true, we can, and maybe sometimes even should talk about it. When a thing is false, we can, and probably should rebuke it. When a thing is unproven, we shouldn't weigh in other than to say we will not be weighing in. Christians ought to be among the most sceptical of people, slow to speak, quick to listen.
Furthermore, whatever our opinions end up being on a given conspiracy, it is absolutely vital that we not make it our main focus. In both Old and New Testaments, we are told that this world, which is actually under the power of the devil (1 John 5:19), will contain all sorts of great evils. Sometimes, maybe even often, this means Christians will experience persecution. Yet, even while he was in chains, Paul tells us that we should be content (Philippians 4:10-13). Furthermore, Isaiah warns us “Do not say, ‘A conspiracy,’ Concerning all that this people call a conspiracy, Nor be afraid of their threats, nor be troubled. The Lord of hosts, Him you shall hallow; Let Him be your fear, And let Him be your dread." (Isaiah 8:12-13).
From this, we see that even when conspiracies succeed, we have a more important message. There is a God to whom we are all accountable. From the most powerful monarchs to the most innocent of children, all are accountable to God, all are in His hands. The devil himself cannot conduct his affairs on the Earth unless God ceases to restrain him, meaning no conspiracy will ever succeed unless the Lord, in His wisdom, allows it. Rest assured, in such dark times, there is good to be brought about (e.g. Romans 8:28).
That's not to say we should not speak out when conspiracy is proven. We should absolutely do what is within our power, so long as sin is excluded, to ensure justice is done, the oppressed are protected, and the vulnerable are provided for (Isaiah 1:17). Of course, as Christians, we don't know what God intends. It is not our job to say "well, God probably wants this evil thing to happen, and if He doesn't, He will step in." According to James 4:17, if we know the good we ought to do, and do not do it, that's sin. Thus, without explicit word from God, when we see evil, we should speak against it, and when we see opportunity to curb evil, we should take it.
Ultimately, the Christian view of conspiracy theories should be this: Don't dismiss the possibility of conspiracy, especially where there is convincing evidence, but at the same time, do not be taken for a mug, and ensure evidence for the alleged conspiracy is solid. Until a conspiracy should be proven beyond reasonable doubt, we shouldn't consider it a truth worth speaking. The world is full of enough evil without us making stuff up. But at the end of the day, conspiracy theories, regardless of their credibility, should not be our focus, nor should we be even remotely scared when conspiracy seems to be occurring. We serve a God so powerful, He laughs at the wicked, with all their pitiful schemes against Him and His anointed (Psalm 2:2-4). We, therefore, need to trust completely in Him, knowing that even if justice is never done on the earth, there is nothing that will be hidden from Him at the Great White Throne Judgement. No Christian should be panicking, because God is still on His throne. Conspiracy theories are often designed to cause fear, but we, as Christians, should always rejoice that our names are written in Heaven (Luke 10:20).