I could never understand the proselytizing impulse. After all, if one had the truth, wasn’t that the end of it? To be sure, there are some kind souls who would like to share heir good fortune, but that does nothing to explain the vitriolic view of infidels in general held by believers. Why this unreasonable insistence that people believe something, anything? Surely, if you believe yourself to have The Truth, all who failed to acknowledge that would be equal, whether they believed in a competing system or not. Finally, I think I have the answer. It came to me in a flash, like St. Paul. Lucky I wasn’t riding a horse.
If you’re pushing an agenda, you can’t count on anyone coming to your assistance on the basis of reason. Too unpredictable. You need blind faith for something like that. Similarly, it’s harder to predict the actions of another group if they’re being rational.
Reason is so fickle. Change one little fact and everything falls apart; worse, it’s impossible to know and take into account all possible factors. This is especially a problem when dealing with adversaries, who almost certainly have privy to facts which you do not. Ah, but true believers, that’s a whole different kettle of fish. You know straight up what they think, how they will react, and what their motivation will be. As for your own cohort, you can be sure of their support without lengthy and tedious rational explanation. All goes smoothly!
Now the only issue is to get rid of all those pesky infidels. You can’t count on them for anything.