It would be unlikely for any of these attacks to be from anyone but Muslims. If my memory is correct all the previous attacks to the current ones, for example, Oklahoma city were direct at the government; which the only we now have are directed at civilians. Muslims target civilians while other radical group go after the government, typically federal.

Separatist groups are anti-federal government Islamic Jihad targets civilians and women and children in particular as this causes the most anger and fear. Other Islamic supporters than tell us this is happening because we are mean to Muslims and if only we would allow Sharia law everything would be fine. In other words if we would only live under Sharia law we would be at peace with them and the violence would stop. We can see how well this has worked in the rest of the world so do not fall for this false narrative!