Can our discussions here in Religious Forums make a difference in the world around us?
Definitely. Ideas can spread fast and be very consequential, if they are handled with enough wisdom and care and exist in environments that are sufficiently receptive.
If so, what can any of us do, for our discussions here to do the most good in the world around us?
Make sincere attempts to learn. To learn useful information about doctrines, certainly, but also and perhaps most of all about methods and dangers of expression and mutual understanding.
Frankly, learning to recognize misinformation techniques and to counter them may be the most useful part of that all. I personally favor calling false equivalences what they are point blank. The harm caused by undue hesitancy is often underestimated. It is only human to try our hand at being abusive at least some of the time. It is our duty to realize when that happens and curb it in the bud, even on ourselves.
Another highly valuable skill to be learned is that of sincere apology. It is valuable because it is so hard to pull off, yet so necessary. Sometimes I wonder how often people even realize that there is a significant difference between a sincere apology and a statement of apology that fulfills proper protocols of etiquette. The two entities are a world of meaning apart from each other, but it took me a shamefully enormous amount of time to realize that fact.
Then there is plain admission of ignorance. It is remarkable how often we manage to be at once fully ignorant about certain matters and nonetheless unwilling to let that factor into our certainties. That is definitely something to watch for.
There is also the skill of ... I guess I have to call it good management of despisal. Maybe it is just me, but I have come to realize that I can't help but feel contempt for certain attitudes and ideas that are promoted openly as if they were respectable. The natural instinct is to compartimentalize and seek a confortable distance, and become insultuous and disrespectful when that is not possible. And sometimes that can't be helped. But it is much more fruitful to nurture the attitude of being honest with ourselves about our feelings while at the same time extending a measure of basic respect for the human nature of our interlocutors and appreciation for how slim are the factors that truly separate us from the people that we most despise.
We should never aim to mislead people, even our most despised opponents. But it is just as important, perhaps more, to keep the expectations of our esteemed ones realistic and honest. And our own. We will disappoint and we will be disappointed. That is to be expected and should be dealt with realistically and with respect for the limitations of all people, including ourselves.
Those efforts, by themselves, can in my opinion do a lot of difference in the larger world, mainly by defusing and discouraging most of the expected dangers that form spontaneously all the time. If we learn not to be fertile ground for emotional, political and creed-oriented abuse to take root and spread, that is really a very good thing. If we can achieve inspiring other people to learn a bit more as well, then we should feel very grateful indeed.