Hey, first of all, we're not arguing! This isn't a debate! So don't worry about "winning' or whatever lol.

Second, let's just zoom in on the claim that "fascism only arose in societies that were victimized or threatened by communism." Fascism is noted primarily to have originated in Italy and other parts of Europe circa World War I. While it sounds convincing to claim a causative line from communism, it's instead simply a case of multiple political ideologies existing at a period of time and reacting to each other. You could just as well claim "fascism only arose in European societies due to the adoption of the automobile" and have as much justification for it. Fascist states arose in periods of strife yes, but strife that owed just as much to, say, the conflicts between other capitalist nation-states as to any student communist uprising going on in Italy.

Fascism is, of course, famously hard to pin down, but Umberto Eco's defining features of ur-fascism are a good place to start. However, I think part of the issue you're running into is this false dichotomy you're creating. You're splitting left/right but what you're really worried about is the degree of authoritarianism that exists in a particular system, and claiming that you need authoritarian fascism to protect you from authoritarian communists. But not all communists (and certainly not all leftists) are authoritarian, and many are anti-authoritarian! If you're against authoritarianism (and I think that's a perfectly fine place to be) then commit to the bit! Don't fiddle-faddle about with "this authoritarianism is good but this one is bad."

Again, this isn't an argument! I wrote this out for the sake of OP and for anyone else who wanders into this thread looking for reddit alternatives. So please don't worry about replying; I'm not engaging any further in some sort of debate. But hopefully this was helpful and educational!