You asked who holds the opinion that speech can constitute violence; I answered. The answer is that a "hodge podge" of people hold that opinion.

If you don't know anything about the survey, read the survey. I intentionally linked the results because I didn't want to present a biased synthesis as fact.

Antifa holds that opinion, and believes violence is justified in return.

From the Atlantic piece previously linked:

> the parade’s organizers received an anonymous email warning that if “Trump supporters” and others who promote “hateful rhetoric” marched, “we will have two hundred or more people rush into the parade … and drag and push those people out.”

> An article in The Nation argued that “to call Trumpism fascist” is to realize that it is “not well combated or contained by standard liberal appeals to reason.” The radical left, it said, offers “practical and serious responses in this political moment.”

> Antifascists call such actions defensive. Hate speech against vulnerable minorities, they argue, leads to violence against vulnerable minorities. But Trump supporters and white nationalists see antifa’s attacks as an assault on their right to freely assemble, which they in turn seek to reassert. The result is a level of sustained political street warfare not seen in the U.S. since the 1960s. A few weeks after the attacks in San Jose, for instance, a white-supremacist leader announced that he would host a march in Sacramento to protest the attacks at Trump rallies. Anti-Fascist Action Sacramento called for a counterdemonstration; in the end, at least 10 people were stabbed.

> A similar cycle has played out at UC Berkeley. In February, masked antifascists broke store windows and hurled Molotov cocktails and rocks at police during a rally against the planned speech by Yiannopoulos. After the university canceled the speech out of what it called “concern for public safety,” white nationalists announced a “March on Berkeley” in support of “free speech.” At that rally, a 41-year-old man named Kyle Chapman, who was wearing a baseball helmet, ski goggles, shin guards, and a mask, smashed an antifa activist over the head with a wooden post. Suddenly, Trump supporters had a viral video of their own. A far-right crowdfunding site soon raised more than $80,000 for Chapman’s legal defense. (In January, the same site had offered a substantial reward for the identity of the antifascist who had punched Spencer.) A politicized fight culture is emerging, fueled by cheerleaders on both sides. As James Anderson, an editor at It’s Going Down, told Vice, “This shit is fun.”

Did you read all of those pieces in the eight minutes between my comment and yours? Your arguments suggest you don't. You can't ask for examples and dismiss them, refusing to read the things I link.