Matthew 24:24 & 25 For false Christs and false prophets will appear and perform great signs and miracles to deceive even the elect–if that were possible. See, I have told you ahead of time.
Just because fools gold exists doesn’t mean there’s no such thing as gold. God is infinitely more precious than gold! In other words, will you allow yourself to not follow the real God just because someone out there is a hypocrite or would you refuse a great paying job in your field of choice just because some of the people in that line of work are liars and cheats. Of course not, it should strengthen your resolve to do that job even better.