People believe all sorts of things.
"There's a sucker born every minute" P.T. Barnum
The Universalists teach universal salvation but its not biblical. Anyone who teaches your premise is not quoting from scripture which rather says this
Luk 13:24 Strive to enter in at the strait gate: for many, I say unto you, will seek to enter in, and shall not be able.
Mat 7:13 ΒΆ Enter ye in at the strait gate: for wide is the gate, and broad is the way, that leadeth to destruction, and many there be which go in thereat:
Mat 7:14 Because strait is the gate, and narrow is the way, which leadeth unto life, and few there be that find it.
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The "new earth" in scripture is a spiritual concept - not at all literal. God will never destroy earth and replace it with another one.