The old Silurians were a million times better. The whole point of the original story is that they don't have human faces, but that doesn't mean we should treat them differently.
Giving them human faces ruins the point and just comes across as xenophobic. As if the audience shouldn't care about people who don't look like them.
I think it's meant to reflect how we see different races as less alien than many decades ago, but have random compulsions to kill them even with the slightest difference, so it expands the message closer to discrimination in general, and not only racial discrimination which is an old story, and they even look a bit like they have some skin disease.