These terrorists have stewed up their own illusions of "martyrdom" inside their wackjob echo chambers on Reddit, Discord, and other sewers of the net sphere.
Make sure you and all Patriots you know are armed ALL THE TIME. Even in the safety of your residences.
Encourage teachers, pastors, sports coaches, and others who are guardians of potential soft target hotspots like schools and churches to carry and become proficient in defensive shooting. Help them through the permit process if one is needed, bring them to classes and range meets.
Carry everywhere.
Train on the Dickens Drill at the range so you can have the maximum confidence engaging threats even at extended ranges.
Keep your heads on a swivel and always be on the lookout for suspicious activity.
From a tactical standpoint, that is most we armed citizens can do at the moment to make sure that we harden the defenses around us and the most vulnerable individuals that we care about. Other than that, those who are active on social media, WATCH for red flag keywords and activity, report potentially terroristic content, and if you can, alert the local LE agencies in these cocksuckers' own home areas if they are posting edgy shit that can easily be construed as intel for upcoming violent activity.