See, this is what I mean, you're an unintentionally very funny person. Using the 100 million figure comes from the long debunked Black Book of Communism, which included Nazis killed during World War II, was made before Yeltsin opened up the Soviet Archives, which even right-wing historians see as the most accurate, and where the author Robert Conquest literally made up numbers in order to get to the 100 million figure, a nice round scary number.
Moreover, you are far understating the deaths caused by Capitalism. 15 million people die per year of preventable poverty, as a direct result of Capitalism. even if we believe in the already laughably debunked 100 million figure, Capitalism's bloody toll already eclipses the supposed death toll of Communism in a century in less than a decade.
Further still, you are exclusively using the Nazis, not all far-right violence. Churchill caused the deaths of 4 million Bengalis, the US invaded Iraq and killed 1 million people and destroyed their critical infrastrucure on false-pretenses of "WMD" that we know they knew better in order to grab their oil, 7 million people died in the 1990s when Capitalism replaced Socialism in the USSR, half a million were killed or maimed by Agent Orange in Vietnam, millions died from US bombings in Korea and Vietnam, and so, so many more.
Communism, on the other hand, has brought massive improvements in life expectancies, such as doubling in the USSR and PRC, massive jumps in literacy rates, robust safety nets like free and high quality healthcare and education, full employment, childcare, lower retirement ages, and much, much more. It is Communism to thank for the massive reduction in poverty over the last century, thanks to the USSR and PRC, while if only Capitalist countries are checked that number goes up, as in more impoverished. Communist countries also ended famines in countries where famine was common beforehand, like Agrarian China and Tsarist Russia.
See how the Soviets democratized their economy (also read Soviet Democracy ):
Lowered wealth disparity dramatically:
While maintaining one of the most rapidly developing economies in the world (also read *[Is the Red Flag Flying? The Political Economy of the Soviet Union) ):
I recommend reading Blackshirts and Reds, believing Communism to be just as bad as Nazism, or somehow worse, is a form of Nazi apologia. The truth is that the Nazis were unquestionably worse, and that by trying to minimize their evil you're doing the work of fascists for them. The Communists were the ones who defeated the Nazis and stopped the holocaust, 80% of total World War II combat was on the Eastern Front., without the Red Army the Nazis likely would have won.
If you want to learn, I am more than happy to help. I keep an introductory Marxist-Leninist Reading List and can help dispel some of the outdated Red Scare mythology that evidently you still believe. However, if you're going to go around calling people "commies" and saying they are worse than the Nazis, then all you'll get is a bunch of essays and articles, books, videos, etc debunking your claims, and a bit of laughter that someone still uses the word "commie" as an insult.