If you really want to go for a loop on this point, Eckhart Tolle has this theory that Jesus' whole shtick was present moment awareness misinterpreted through the ages. When it comes to this line in particular, he had lectured to the effect that a rich man is a person who has abundant thoughts and therefore any attempt to find peace, God nature, cessation of mind made suffering, etc. is futile because you can't stop the mind machine from spinning. You'd have an easier time getting a camel through the eye of a needle than to think your way out of suffering.
I honestly like this interpretation and then I'd follow up saying that the bible would be a poor piece of theory for communist revolution. For every piece of Jesus kicking out merchants and line like this, you could find some cringe that has nothing to do with anything.