Actually heres a funny thing....
Volos.
- Alignment. Orcs are vicious raiders, who believe that the world should be theirs. They also respect strength above all else and believe the strong must bully the weak to ensure that weakness does not spread like a disease. They are usually chaotic evil.
Eberron.
- Alignment. The orcs of Eberron are a passionate people, given to powerful emotion and deep faith. They are generally chaotic, but can be any alignment.
Exandria.
- Alignment. Ores fear the curse of ruin that is said to plague their race, and tend strongly toward either chaos (accepting their fate), or toward law (rejecting it).
Ixalan
- Alignment. Most orcs lean toward chaotic alignments, and many serve on pirate ships that encourage an inclination toward evil.
So whats REALLY the problem here beyond some poorly worded fluff in Volo's? OR, is every one of these a problem, and we simply cannot default (or even SUGGEST) that there is an Alignment for a lineage?
I dont know. I remain where I started. Clean up the clearly poor text (CoS, Volo's) but the alignment stuff isnt the problem.