Jesus vs 247 million people, who is telling the truth?

According to a statistic, 247 million in the United States identify themselves as Christians about 79.5% of adults. 

Jesus says "Enter through the narrow gate. For wide is the gate and broad is the road that leads to destruction, and many enter through it. But small is the gate and narrow the road that leads to life, and only a few find it."- Matthew 7:13-14 

Jesus says only a FEW find it. So I ask you now, who is telling the truth? The millions and millions of "christians" claiming to follow Jesus, or Jesus Himself saying only a few?

I believe Jesus!

• "Many will say to me on that day, 'Lord, Lord, did we not prophesy in your name and in your name drive out demons and in your name perform many miracles? Then I will tell them plainly, 'I never knew you. Away from me, you evildoers!' "Therefore everyone who hears these words of mine and puts them into practice is like a wise man who built his house on the rock. The rain came down, the streams rose, and the winds blew and beat against that house; yet it did not fall, because it had its foundation on the rock."- Matthew 7:22-25 

That's why the bible says "Examine yourselves to see whether you are in the faith; test yourselves. Do you not realize that Christ Jesus is in you--unless, of course, you fail the test?"- 2 Corinthians 13:5