First of all - in the interests of transparency - I have been outspoken against Trump in several blog posts on multiple occasions. I mention that in order to stress the fact that I do not a horse in this upcoming election race, so to speak. With that being said, here is my perspective on what has happened as far as riots across the country were concerned, all of which can be backed up with very simple Google searches.
As we have all seen, in the wake of George Floyd's and other tragic deaths, protests erupted across the country, and justifiably so. However, many of these protests quickly devolved from peaceful assemblies - as defined and protected by the Constitution - into quagmires of violence and crime. During all of this, the mayors of predominantly liberal cities - e.g. Seattle, Chicago, Portland, etc. - ordered their police departments to step back in order to allow protestors to "express their opinions." As a result, we had debacles like Seattle's CHAZ/CHOP - which made Seattle a laughingstock to the rest of the country. Nothing was gained by that event; it only made Seattle's already inept leaders look horribly worse. However, other major cities did not learn from Seattle's mistakes.
Of course, a common sense examination of what was happening around the country would immediately demonstrate that there were fewer and fewer "protestors" participating in the actual protests, with an ever-increasing set of opportunistic looters and violent anti-police thugs (e.g. Antifa) showing up and instigating wide-spread violence. When our ineffective combover-in-chief offered to send in troops to help these cities, his offers were refused, with people like House Speaker Pelosi likening federal troops as "Stormtroopers," and House Whip Clyburn calling them the "Gestapo."
That being said, it is a matter of speculation why these mayors allowed their cities to descend into chaos. The conspiracy theorists would have us believe that the Democratic Party thought that they could manipulate this situation into disparaging Trump ahead of the election, and I have to admit - I think that theory is entirely plausible. However, if so, they played their hand too soon, because now the violence has gone on for months, and people are tired of it. However, for the most part, people are not pinning the blame on Trump anymore, because people are smart enough to realize that he's too far removed from the communities that are being targeted by the rioting, and people are starting to wake up to the idea that it's their local leaders who are failing to restore peace in their cities. As a result, Democrats running for office (both local and federal) have begun to drop in the polls, so now these same leaders [sic] who ordered their police departments to step back and allow the rioting, looting, and other crimes to persist, are starting to take to the airwaves and denounce the very same rioting, looting, and other crimes that were previously happening unabated on their respective watches.
So here's my final analysis: there is no single public leader who may have actually said the words, "I support rioting." However, many public leaders' inactions allowed the riots to form and to continue, and all the while they did nothing about the violence and crime that were the logical outcomes of said riots. If we are to believe the voices of the "woke generation" that "Silence is Violence," then I think it is perfectly acceptable to say that any of these mayors who let their cities burn, and ordered their police departments to stand down, and refused federal assistance, were tacitly supporting the rioters, regardless of their useless rhetoric on the matter.
Legend tells us that Nero played the fiddle while Rome burned, and then pinned the blame on Christian martyrs. However, history would eventually reveal that the Christian martyrs were innocent, and Nero's actual intention had been to clear out neighborhoods to extend his palace. Now it seems as though a similar scenario is playing itself out on our modern stage; Democratic mayors fiddled away as their cities burned, and now that their communities have been reduced to ashes, the lost and disenfranchised are looking for whom to blame for their suffering. Like Nero before them, Democratic leaders are trying to blame the innocent, but if history repeats itself, the public will realize where the real guilt lies.