Of course this looks like conspiracy if you don't, A) know your history, and B) live in an echo chamber created by mainstream media.
So here is a little history lesson that should shed some light on Antifa. The tactic used by many of the parties of the 1930's was to tell people that their political opponents wanted to be dictators and have the government take control of everything. In other words, they were fascists calling their enemies fascists. They would tell people what they were allowed to think and then quell any opposition speech. Antifa is on record multiple times saying they do not want free speech. The mainstream media keeps saying they are peaceful protestors and that 2nd amendment marches are violent people, yet only one of those events always results in multiple arrests, people getting hurt and property damage. And yes, it is the Antifa events.
To add insult to injury, Soros is know to fund many Democratic platforms, including some that support antifa. Again, this is fact. Part of the wonderful law in the states is that you have to actually declare where you get your donations from, so again, we know Soros funds many Democratic platforms and campaigns. Call it a conspiracy theory all you want but that won't change the taste of ketchup.
If you wanted to make the case that not all Democrats are funded by soros are believe in Antifa tactics, I would give you the high ground. But that isn't what the meme is saying, now is it?