Our values are murderous, I wouldn't want to be visited by aliens that shared out values. A galactic version of human society would quite reasonably identify that earth couldn't fight back then special interests would have our planet liquidated for its natural resources without making headlines in space-news. Possibly colonise us, kill all the humans then offer an apology a few generations later and maybe a small local holiday to commemorate the process.

Regardless, there aren't that many possible values aliens could have. It is hard to come up with something outside basic game theory - you can see how most religions tend to converge on the same practical principles over time, like basic property rights and not causing trouble pointlessly.