https://www.nytimes.com/2018/10/27/us/active-shooter-pittsbu...
Also, the bombs sent to a number of democrats, funders of democrats, and Trump critics:
https://www.washingtonpost.com/nation/2018/10/25/bomb-timeli...
That said, individual events aren't particularly helpful, the media might be omitting major events (or more likely, a lot of smaller ones). So you can refer to this study by the Cato Instititute:
https://www.cato.org/blog/terrorism-deaths-ideology-charlott...
After Islamic Terrorism (9/11 unsurprisingly had a pretty big impact), you have right wing nationalists being the biggest contributors to murders by an order of magnitude.