I very recently became a communist. I definitely agree with a wealth of Marx's thought, though there is still quite a considerable amount of reading I have yet to do. However, in a debate with an acquaintance of mine I was absolutely perplexed by this quote from Marx Engles On Britain published in the People’s Paper of April 16, 1853:

"The classes and the races, too weak to master the new conditions of life, must give way."

Link: https://www.marxists.org/archive/marx/works/1853/03/04.htm

(It's in the second to last paragraph)

I'm worried that this implies both Marx and Engles argued for genocide. Is there any other explanation? Did they perhaps have a different meaning for race? That does not appear to be the case, reading through the document. Were they talking about revolution in general? Even if that's the case I do not see how that could justify genocide. Does he not mean their death when he says "give way"?

These questions worry me. I hope someone has answers :/