Could we say this is something of a metaphor for the attitude of many to not only Jesus in the Blessed Sacrament but also His Church? A metaphor for the refusal to accept Catholic teaching and dogma?
A symbol of pride perhaps? Rebellion? Kneeling is the position of the supplicant......the humble man.
It's arrogance! That attitude is quite pervasive in today's society. And, as you well noted, a lack of humility.