"Rather than belittling people in this group" is not about this thread. It applies to a tendency by some people to dismiss or question the legitimacy of someone getting involved in activism or becoming aware of international issues like this for the first time. Everyone has to start somewhere. Everyone has a 'first time' and it's ok for someone's first involvement with protesting etc to be at any age and any stage of their lives.
Rather than suggesting people have selective empathy because this might be their first time getting involved, why not be welcoming and supportive of people starting out and then talk about other conflicts, human rights issues, etc.
If, for example, Yemen's conflict is important to you, then you could start a thread about it and encourage people to learn more and to take action where they can. If you think all conflicts matter, you could start threads about as many ss you can, in the relevant boards.
"All conflicts matter" sounds a lot like the "All lives matter" efforts to diminish the concerns raised by Black Lives Matter. Of course all conflicts matter. Here, in this moment and this thread, people are talking about an aspect of this conflict. That does not mean people don't talk or care about other conflicts. But preventing or objecting to people talking about specific issues, means that everything becomes vague, messy and unfocused.
May I ask what you do or have done in relation to your concerns about conflicts around the world? Do you attend events, raise awareness, donate, etc?