Thargoids don’t make friends, they prefer to remove things.. permanently.
Love the fact you’d like to kill the Guardians though, since they were attacked by the Thargoids as well, even though they tried to communicate with them first.
We’d probably need a new species if you want to be friends with Aliens, because the Thargoids are definitely not interested.
That's all are The Club myths.
Thargoids are super peaceful - even during the war they are not attacking you when hyperdicted, unless you carry a parts of their friends bodies.
Also, the Guardians and humans are the aggressors - they occupied the Thagroids worlds (marked with barnacles - which could be places//things of significant importance for goids!..), while Thargoids are only defending their territory.
What about the recent researches about terraforming Ammonia worlds, huh? What would you say if goids will start to ammoniaform a ELWs?
Goids are 100% peaceful explorers, unless they have to defend themselves. They are wandering between stars, learning the secrets of the witchspace, probably even learned a way to other galaxies!