From the beginning, I felt the bombers were Americans. I felt they had to know the meaning of Patriots Day and the Boston Marathon to the people of Boston. I was dubious that international terrorists would have such an intimate knowledge of the city and its people. I was proven right. (Yes, they were born in another country; however, they became Americans after living here. We don't call Saint Paul a Jew, we call him a Christian. Why? He converted to that faith. Same thing here.)
As for its impact on Star Trek, although I would like to see a memorial to the victims of the bombing at the beginning of the film, i.e. STIV's tribute to Challenger
, I am not sure if one will be made.