I highly doubt that Marx advocated for the killing of anyone in his political writings.
All from the Communist Manifesto (which i have downloaded and read more or less)... should i cite page numbers and provide a link to the pdf? I dont mean to plagiarize here. And ya, i got nothing from Das Kapital because its a pain to read and I'm not gonna be that guy to cite a source about literature without being at least somewhat familiar with the piece first.
Destruction of property and physically attacking humans:
"Freeman and slave, patrician and plebeian, lord and serf, guild-master‡ and journeyman, in a word, oppressor and oppressed, stood in constant opposition to one another, carried on an uninterrupted, now hidden,
now open fight, a fight that each time ended, either in a revolutionary reconstitution of society at large, or in the common ruin of the contending classes."
"At first the contest is carried on by individual labourers, then by the workpeople of a factory, then by the operative of one trade, in one locality, against the individual bourgeois who directly exploits them. They direct their attacks not against the bourgeois conditions of production, but against the instruments of production themselves; they destroy imported wares that compete with their labour, they smash to pieces machinery, they set factories ablaze, they seek to restore by force the vanished status of the workman of the Middle Ages."
"Here and there, the contest breaks out into
riots"
"In depicting the most general phases of the development of the proletariat, we traced the more or less veiled civil war, raging within existing society, up to the point where that war breaks out into open revolution, and where the
violent overthrow of the bourgeoisie lays the foundation for the sway of the proletariat."
I think its clear that the communist revolution is violent and deadly. As for Marx calling off all of the bourgeois:
1) Learned in my political theory class Marx advocated the killing of all o the bourgeois
2) "The bourgeoisie has through its exploitation of the world market given a cosmopolitan character to production and consumption in every country"
"The bourgeoisie, by the rapid improvement of all instruments of production, by the immensely facilitated means of communication, draws all, even the most barbarian, nations into civilisation. The cheap prices of commodities are the heavy artillery with which it batters down all Chinese walls, with which it forces the barbarians' intensely obstinate hatred of foreigners to capitulate.
It compels all nations, on pain of extinction, to adopt the bourgeois mode of production; it compels them to introduce what it calls civilisation into their midst, i.e., to become bourgeois themselves. In one word, it creates a world after its own image."
-Meaning the bourgeois spread their mindset to the population, including the proletariat. They infect society. If the revolution does not kill all of the bourgeois, this mindset can and will spread.