The Bible says all men are without excuse. Even those who are given no good reason to believe and many persuasive reasons to disbelieve have no excuse, because the ultimate reason they do not believe is that they have deliberately rejected God's Holy Spirit.
Should a conflict arise between the witness of the Holy Spirit to the fundamental truth of the Christian faith and beliefs based on argument and evidence, then it is the former which must take precedence over the latter.
But the argument is still unsound, because the first premise is false: there are other unmentioned alternatives, for example, that Jesus as described in the gospels is a legendary figure, so that the trilemma is false as it stands.