If they adhere to Camping’s preaching they’ve already abandoned Christianity. Please do not imply Camping is a Christian. He’s a charlatan.
I’m not implying camping was a true Christian.
But many a Christian is weak in Christian education and many who were/are weak and biblically “ignorant” (lacking in knowledge) were led into believing Camping, concerning his predictions.
I believe He forgives them and He wants them not to lose all faith but to find their way back to Him.
I was not - never was - implying Camping was a Christian.
However, I do believe that some of his followers were Christians whose foundations in their faith were weak; not strongly informed; not well studied. To use a descriptive phrase that may not fully describe some his lesser followers, let me call it “simple minded” (uneducated) Christian sincerity.
“Christians” (on an individual level) have fallen prey to the Harold Campings of the world in every century in the last 2000+ years.
I believe it is like “throwing out the baby with the bath water” to insist that WE KNOW that EVERYONE who got caught up in what Harold Camping offered were ALL - to a man, woman and child - as “unChristian” as Mr. Camping.
Personally, I leave that judgment to G-d, as the knowledge of it is His and His alone; not mine.