I'm not a native speaker so excuse my english, but I'm also in a phase of my life in which I think about this topic a lot.

I was also very dogmatic as a teenager and thought that every question can be sufficiently answered through science and logic. I think the urge to believe this comes from a deep fear of difference: the thought, that there are *really* other people out there, thinking differently, people with a behavior you can't control or even predict, but whose mind is just as complex as yours, is more scary than anything else. And the believe in an absolute truth in ethics is the believe that people can be judged and valued through one and only one principle. Having such a principle makes it far easier to live with the radical difference of other people, because now you can reduce them to their value under that principle instead of having to deal with a being that has the same complexity you yourself have. This is not a liberating revelation for me, to the contrary: it is pretty scary. Now it can seem that judgement is consequently wrong in any circumstances.

But I think we still have a moral imperative to help other people: Understanding - even if you can't ever really do that - but at least trying to understand other peoples complexity not only humbles you to the point, where you don't want to make any judgement anymore, but it also gives you the task of treating these people in a way that respects their dignity. And our world in its current state just doesn't do that. You can't help repressed people by being humble and silent. Silence just enforces the status quo. But when we really believe only that: the dignity of all people. And every dogmatic narrative melts away because of relativism, than we HAVE to change the state of our world: The most difficult thing to learn is that being *only* respectful and nice is also just a way of protecting yourself from the radical truth that people as complex and human like you* are suffering every day in an unspeakable way through the hands of other people including you and me.
Really understanding that there is no absolute truth means putting aside all ideology, seeing the suffering of people without making up any excuses and establishing a way of living in which we all can live a humane life. And that can't be done through metaphysics and can't be done through analysis, that must be done through action and this action will and must sometimes be judgemental.