The left has been pushing hate and rage for years, inciting violence constantly. This has culminated in a leftist (or at least someone who bought the left’s rhetoric to an extent) assassinating someone. Conservatives aren’t starting a war, the left started this war many decades ago, and they have really crossed the line now. We may be at a significant FAFO moment in our history - remains to be seen what that means in the coming weeks/months/years.
Necessary disclaimer: the term “left” used above does not describe those that simply have liberal views on economics, healthcare, social services (e.g. welfare), etc. It describes those who hold views diametrically opposed to American/Christian values and seek to destroy those ideas and institutions. Examples are movements like Antifa and BLM, people who openly cheer, or at least tacitly support, murder of those they disagree with, etc.