What sense can be made of why any sentient being on the planet could be against birth control? They can’t be blind to millions of disenfranchised children all over the globe and in every country who are exploited for cheap or slave labor, for armies and even among the affluent, sex. Without their pimps, even many five star hotels would have less business. That is the real sin.
The religious pious have no moral justification for interfering with aid in controlling population growth in underdeveloped countries and should not be allowed or encouraged by American politicians to do so.