The observed behaviors do appear to contradict physical laws.

My point is if we’re looking for an explanation, it’s either some natural phenomenon or illusion that we don’t understand, human technology, or alien technology.

In either of the latter two options, we are either talking about new physics or very advanced spoofing tech that looks like new physics but isn’t really.

For human tech, we’ve never seen anything resembling a leap like that being accomplished by a government in total secrecy. It’s hard to imagine. I think this holds even if it’s just crazy advanced spoofing, given the details of the various encounters.

But for alien tech: if intelligent aliens do exist and they did visit us, it would follow that their technology and scientific understanding are far beyond our own. It’s basically impossible that they wouldn’t have knowledge of new physics that we have no current inkling of, just as a scientist from a thousand years ago could have no inkling of relativity or black holes. In this sense, strange inexplicable phenomena that break the laws of physics (as we currently understand them) are consistent with aliens.

So to me, the real question is whether we can figure out a natural phenomenon to explain this. If it is something natural, it seems like it has to be something pretty weird. If it’s not, aliens seem like a valid candidate, pending further evidence.

The reverse of that is assuming our instruments (which eyes totally are) are perfect and therefore if they saw something it must be the first guess and not just an error or misinterpretation.

You're basically saying "alien tech is un-understandable however we can still easily tell it is alien and not measurement error"

Measurement artifacts or malfunction (and mistaken eyewitness accounts from multiple credible observers) are another possibility, but they're difficult to square with the data. There's just too much signal, measured in too many different ways, to handwave it away like that.