What are your parameters? It's true that killings by terrorists on US soil got a bump from the Orlando massacre. But before that time, the following statistics applied: 

"Since 9/11, an average of nine American Muslims per year have been involved in an average of six terrorism-related plots against targets in the United States. Most were disrupted, but the 20 plots that were carried out accounted for 50 fatalities over the past 13 and a half years.

"In contrast, right-wing extremists averaged 337 attacks per year in the decade after 9/11, causing a total of 254 fatalities, according to a study by Arie Perliger, a professor at the United States Military Academy’s Combating Terrorism Center. The toll has increased since the study was released in 2012." (NYT 16/6/16)

You referred to attacks by Muslims numbering in the "thousands." Where does this number come from? I referred only to Canada and the US.