In light of the Boston Marathon bombings, will Harrison's terrorist actions/bombings in the movie be too much to stomach?
For a few directly affected by them? Perhaps, depending on the individual.
For the vast majority of the viewing public? Of course not. Terrorism has been going on long before films were around, and it is a dog whistle topic for modern "entertainment".
Something tells me that he may not be a particularly sympathetic villain - I doubt we'll be getting too much in-depth analysis of the morality of his actions (though I would be delighted to be pleasantly surprised).
Kim: I'm detecting some weird technobabble.
Janeway: A possibly dangerous anomaly that we know nothing about?
Kim: Yeah. I suppose we should steer clear.
Janeway: Ha! Good one, Ensign. Take us in, Mr. Paris.