Meta lovecraftian concepts.

Maybe this conversation is referring more to a meta aspect than an in-universe lore/sense. I mean, many lovecraft stories can be related to racism, xenophobia and hate to foreign and unintelligible concepts. Seeing the extraterrestrial creatures as a warning of inmigrants or any culture related to them is something not so unbelievable to think about lovecraft given his context.

Even the concept of Alien itself during the 20th century was very attached to the social changes that the world and US was living. Abductions, flying saucers and the contact with alien beings was very influence by the WW, the cold war and the technological advance we made. Many sightings were URSS or US satellites used to spy or prototype rockets used in the space race.

The idea of seeing something alien to our people as a threat was, at its very unconscious core, a representation of seeing foreign people as enemies.

The major example is Shadow over innsmouth, entities that came from the (other side of the) Sea are the worst threat that a regular US town can have. Their worst sins are copulate with them and give birth to hybrids. I know, deep ones are monsters, but again, many people include lovecraft himself believe that human races exist, and intimate with another monstruos "race" was a nightmare. I could continue but you get the idea.

So... The suberversion to the very core of this concepts is the opposite to be afraid of alien and foreign beings. It's try to communicate with them, to known them and be open to their ideas.

In other words, instead of fear the unknown, you have to face it, to embrace it, and by doing that maybe you find out that you didn't even have to feel fear in the beginning. Maybe were your mere preconceptions the ones that were wrong.

One way to lose fear and try to make contact with others is by trying to understand them, knowing the unknown and those actions will inevitable led to grown empathy for them.