That's a huge exaggeration and isn't remotely true.
As usual, as soon as anyone attacks their precious doctrine, Calvinists show up with rude, condescending attitudes and imperious demands. *sigh* There are plentiful examples in the witness of Scripture but, here are some from the OT and the NT. If you insist, I will provide more but even God only require two or three witnesses to convict someone of a crime (Deuteronomy 19:15).
OT: Proverbs 3:5 "Trust in the Lord with all your heart, and do not lean on your own understanding."
Isaiah 12:2 "Behold, God is my salvation; I will trust, and will not be afraid; for the Lord God is my strength and my song, and He has become my salvation.”
Isaiah 7:9 "And the head of Ephraim is Samaria, and the head of Samaria is the son of Remaliah. If you are not firm in faith, you will not be firm at all." The NLT is even more to the point: "Unless your faith is firm, I cannot make you stand firm."
NT: Matthew 21:21 "And Jesus answered them, 'Truly, I say to you, if you have faith and do not doubt, you will not only do what has been done to the fig tree, but even if you say to this mountain, ‘Be taken up and thrown into the sea,’ it will happen."
Romans 10:17 "So faith comes from hearing, and hearing through the word of Christ."
Hebrews 11:6 "And without faith it is impossible to please him, for whoever would draw near to God must believe that He exists and that He rewards those who seek him."
John 1:22 "But to all who did receive him, who believed in His name, He gave the right to become children of God..."
Mark 11:22 "And Jesus answered them, 'Have faith in God'."
There are many more--especially in the NT.