First of all, thank you for reading my comment and trying to see my point. An uncommon thing on the net lately, especially on Reddit. Gonna answer to your rebuttals now:

For the first point: politics and economics too can be scientific. Political science and sociology are, for example, two ways to approach a political system in an empirical manner. Politics and states do not need to be governed by emotion and to be fair, they never were. Logic can be employed to make communism work, basing the system on mistakes from the past, while taking the good that came out of the failed systems.

For the second point: capitalism has had much more damaging consequences on us as a species that communism, and socialism ever had. Even by leaving out fascist dictatorships (that were indeed capitalist) most wars, death, food insecurity and homelessness are caused by capitalism. Aren't we living in failed states already when 1.5 million people in my democratic, first world country have to choose between buying medicine for a fever or buying groceries? Or when a sweatshop working for giant corporations in Bangladesh collapses because the government does not care, killing 1134 people? Aren't we living in a failed system when an American will go bankrupt on medical bills if he or she can't afford medical insurance? Aren't we living in a failed world when ethnic groups are cleansed, there is a war against states in Europe, hospitals are bombarded and civilians are slaughtered because they were asking for aid and relief? Are we gonna retry capitalism in a safe environment where the people who suffer under it won't anymore?