Most modern vaccinations are, of course, a form of chemical violence against children. If they were all formulated without chemical preservatives (like thimerosal) and dangerous adjuvants (which can harm the nervous system), that might be a different story. But far too many of today's vaccines are chemical concoctions that are entirely unnatural to the human body. To force them into the bodies of innocent children is an act of medical violence.
The method of introducing the vaccines is unnatural and highly interventionist: These chemicals and DNA / RNA fragments are injected directly into the tissues and blood, bypassing the skin (a normal protective defense) and bypassing the digestive system, too. An injected mandatory vaccine dumps foreign material directly into the bloodstream of children without the consent of either the child or the parents -- that's what qualifies mandatory vaccines as "chemical violence" against children.