My statement was that British Special Forces and Loyalists killed leading republicans in Counties Derry and Tyrone between 1987 and 1994. That is a statement of fact.Because I can't think of a single significant Provo murdered by Loyalist terrorists in Tyrone during that time period.
Now you can for whatever reason decide to narrow that down say that no significant Republicans were killed by Loyalists in Tyrone in the late 80s, and even if your statement were correct, it would not detract from the overall veracity of the statement I made, ie: during that period, in those locations, those parties killed Republicans; that fact stands even if you were correct about the specifics of an arbitrary timeframe and location.
However you are incorrect. In Tyrone in the late 80s several republicans, including a Sinn Fein councilor, were killed by Loyalists.
There is presumably a point to your hair-splitting and nit-picking but it escapes me.