Oh boy, you're not ready for regular logical conversation. Proving that the earth must be a globe because God would create larger rather than smaller. It's not logic.

Just, like I said. The earth can be tested to see if it curves and it doesn't. The end. Conclude what u want after first determining certainly that the earth doesn't curve.

Don't assume, or try to make it about religion. Just look at the flat horizon, do the math, where is the curve?

As for Einstein, his theory of relativity, followed by the media overload is what squashed the FE argument at the time, which was running string due to a popular experiment known as Airley's Failure.