It is their opinion that the OP's concerns are overshadowed by larger concerns, that's not "changing the subject", it's a disagreement about where priorities sh

It is their opinion that the OP's concerns are overshadowed by larger concerns, that's not "changing the subject", it's a disagreement about where priorities should be directed with respect to the events discussed in the article, the subject remains unchanged. It's like someone saying "the senate always votes to raise its own pay whenever republicans are in power!" and someone else replying "they only raised it to match inflation, the real problem is that senators are charged with determining their own salary", then, someone responds with "stop changing the subject". If anyone is "changing the subject" it's the person that instigated a contentious meta-discussion about what is and what's not on topic.