It is very difficult to keep in mind that Jesus repeatedly emphasized true faith. He told His disciples over and over that all they had to have was faith.
Yes, there is a counterfeit faith being taught today, but we must focus on being sure ours is genuine. How can you know? I would say that the key indicators are love (Galatians 5:22), and simple LIFE.
When I say life, I am referring to the fact that life brings action. Not to be confused with action bringing life. You see, many people are trying to do, do, do to be Christians, however, that's not true Christianity, it is Law.
True faith in Jesus brings the Holy Spirit within us, and in turn, HE changes us from the inside out. When He LIVES in us, we then do...not because we are trying to be a Christian, but because we are a Christian.
"But if the Spirit of Him who raised Jesus from the dead dwells in you, He who raised Christ from the dead will also give life to your mortal bodies through His Spirit who dwells in you."
~Romans 8:11 (NKJV)