If I were the defense attorney, here's how I'd play it. . .
The McMichaels were effecting a citizen's arrest, which they are entitled under Georgia law to do.
They were armed with shotguns, which is perfectly legal in Georgia.
They "followed Arbery" on public property, which they had every legal right to be on.
Their words to Arbery were perfectly within their rights to say, under the First Amendment.
Arbery made a threatening move toward Travis McMichael, attempting to grab his gun, just as Rosenbaum did to Rittenhouse.
Ergo, McMichael shooting Arbery was self-defense. Just like Rittenhouse.
Should play well to a Georgia jury.