there is a correlation between what people believe and their actions.
By such standards all beliefs are justified by the "good" actions of believers and condemned by their "bad" actions.
And then of course there is the whole ethical issue of what this says about a Supreme Being.
As I said, I do see a serious ethical problem in the "hell" doctrine. Not in the Trinity. If "doctrinal packages" are to be condemned globally by association, antitrinitarianism must be condemned just as trinitarianism, since both have been historically combined with the "hell" doctrine. I doubt you haven't "got" it already.
Doesn't any notion of grace, in the end, "oppose ultimate judgement"?