2 reasons.

1: It’s a conditioned response to protect their dogmas. you see it in most all organized religions/cults. it is to prevent any possible rational discussion, challenge, criticism, and/or dissent. scientism is the secular religion they practice, largely unwittingly/unknowingly. one of the first, and false, things many students are taught is how our “primitive” ancestors once believed that the world was flat and we enlightened moderns would never fall for that again. this biases young minds against ever seriously considering the idea, and outlines the punishment for doing so (becoming “primitive”, thought stupid/foolish; banishment from “intellectual modern society”)

2: The heavily advertised (i.e. funded) flat earth psyop encourages this false enmity (and false dichotomy) between “flattards” and “globetards” in order to further disable, prevent, and suppress any collaboration or earnest discussion/research on the valuable subject.

Untamed emotion blinds and prevents objective study or earnest discussion. There truly is no rational or intellectual reason to respond in such a way to an ostensibly silly claim like “the earth is flat” or any other.

To anyone with an interest, including critical, in the subject; please join us on flatearthresearch to further explore and exchange views!