The Goodyear Tire Company has turned out to have a policy that bans "Blue Lives Matter," which opposes the murder of police officers, "All Lives Matter," which opposes murder in general, and also opposes the racial violence and rioting associated with Black Lives Matter, MAGA attire specifically, and all "political" slogans and attire.
Acceptable are "Black Lives Matter" and all kinds of LGBTQetc. slogans and banners.
The double standard here is that BLM and LGBTQetc. are somehow not "discriminatory" or racist, or even political. And the ban on "Blue Lives" and "All Lives" is because they're implicitly white.
Of course, Corporate HR departments are always anti-white, and they get their power from "hostile environment" law [ What Speech Does "Hostile Work Environment" Harassment Law Restrict?, by Eugene Volokh, 85 Geo. L.J. 627, 647 (1997)].
Hostile environment law bans any free speech by white employees that can be called racist, or any male speech that can be called misogynistic, or any heterosexual or Christian speech that can be called homophobic. (When James Damore was fired by Google over his "Diversity Memo" his bosses claimed that they were more or less required to fire him by law.)
It does not, in effect, ban anti-white, anti-American, Christophobic, or pro-illegal speech, because the people who enforce these things don't think that's racist.
That last is in response to an article that said Microsoft staff are openly questioning the value of diversity, by Dave Gershgorn, Quartz, April 19, 2019.
Openly questioning! Next, people will be "openly questioning" city-burning riots.