He/She is confusing Hal with Harold Camping, self proclaimed theological genius (with zero theological training). Hhe set a date in the 80's. When nothing occurred he decided he still was right, the world was wrong, and went off to lead a cult where he only holds devine knowledge. Probably has about 20 koolaid drinking followers.
Hal Lindsey predicted in his bestseller that the Apocalypse was coming in the generation following the founding of Israel in 1948.