Not really. They are always expecting some type of trouble but for the most part the DNC is politicizing the riot on the 6th because they believe it speaks to their base and damages the GOP.
That said, the DNC's actions are perhaps endangering others (the reason for the riot to begin with was this type of "politics").
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Whats interesting is nomally we hear that Republicans are extremists - but for this incident - we only hear Trump Supporters. Yet, it was the extremists who had planned this - and actually it may have been extensive planing.
Now, IMHO - some not-so-extremists R's just got caught up in all the action.