Considering that something like 98% or so of humanity believes in something, and that belief has been universal throughout history, doesn't that sound a tad bit arrogant? I mean, you are essentially saying that the overwhelmingly vast majority of humanity is mentally deranged and that you yourself are not. "Everyone is crazy but me"
Can millions of people be wrong? Of course, and I shall prove it. We know people suffer delusions and hallucinations, it has been documented and recorded and written about throughout much of our history. There is proof this happens. We can measure brain wave patterns, interview people, and find there is absolutely no evidence to back up the claims of these people. The fact people can be delusional is undeniable. But what about religious delusion?
Let's look at just two religions in the world today. Christianity and Islam. With Muslims and Christians, much of their beliefs are different and exclusive. Muslims don't believe Jesus was the Messiah, and Christians think he was. Christians don't believe Muhammed was God's prophet, and Muslims think he was. At the very least, one of these groups is wrong. They cannot possibly both be right.
Yet each group has millions of believers who have a 'personal connection' with their god. Millions of people are obviously wrong in that assumption, whether it is the Christians, the Muslims, or both. Millions of people are living a lie and have the wrong worldview. Add to those statistics the various other religions on offer, and many millions more can be included in the delusional category. Common sense tells us that there are for definite millions of people on the Earth right now who are deluded about the god they believe in.
98% of the world may believe in the supernatural, yet only 33% are Christian. Don't Christians think everyone else has it wrong? How arrogant!