What does "challenging rackets" mean?

it is incapable of challenging rackets like "the Church."

The writer thinks that "the Church" is a "racket" - slang for business; here used in a negative way.

"challenging" is not an adjective, it is the gerund verb in the clause, subject of preposition "of"

Are you translating this?

By calling the the church a "racket, "the writer is being derogatory.

2. A dishonest business or practice, especially one that obtains money through fraud or extortion.

Are you translating this?

By calling the the church a "racket, "the writer is being derogatory.

PUNKEY wrote:

Are you translating this?

By calling the the church a "racket, "the writer is being derogatory.

Calling the churches a racket is entirely too polite... They are criminal enterprises who take advantage of people's ignorance and gullibility to indoctronate them into a system of belief rather than one of reason, and which they use and reuse to abuse those people out of their rights, and use to abuse all of us out of our rights... They would tell you in a heart beat that their right of religion cannot be curtailed by any majority of the population, and yet, that they have the right with even a minority behind it to deny to vast numbers the rights they find essential to their lives and happiness...

The Churches should be destroyed and at a minimum they should pay taxes and give up the right to vote- if -they will not be governed by reason... Those who wallow in belief have no right to access to democratic government when democracy is our only defense, and it is the only just and intelligent way of governing our lives... If they truly believe in God; they ought to put their trust in God, and quit meddling in Government...In Government the loyalty of the Christian, Jew, or Muslim should not be trusted, because their record is one of screwing up all they touch or turning it toward their benefit... Who are these people who want control of government saying all the time that only God can save us, and that government can and should do nothing because they will themselves do nothing of a moral nature...