Politics have consequences. When elected politicians vote to arms ongoing genocide, people die. When elected politicians vote to deny people healthcare, people die. Politics and its consequences is inherently violent. 
. If you want nonviolence take up rattan basket weaving
All of this is true, but I can already hear the lib reaction. 3/4ths of it will be hand waived away as “not violence” because the direct action doesn’t cause any direct physical harm in their eyes. The remaining 1/4 they might sheepishly admit is violence but “it’s just how things are”