Well, if you figure most of the search engines, forums and website management (blogs etc) are hard Left leaning, finding information online is going to be hard. Really, this is just the militia groups that have always been around, though they may be growing and moving more towards action than they used to be.
This has been boiling for a VERY long time, and these uncontrolled AntiFa/BLM riots and making the divide more noticeable.