The problem is that what constitutes politics? Guns shouldn't be political, who you have sex with shouldn't be political...but in our current climate, they are both considered political. ..and no debating? Most people at Google are shades of left. It sounds like they are just trying to drown out dissenting views once again.
Everything is political, and politics affect everything. If you think there are no politics in something it's likely that the politics involved in it are not close to you, but that doesn't mean they don't exist. Identity isn't political, until you have one that isn't an accepted norm. Sexual orientation isn't political, until people want to deny you insurance over yours. Race isn't political, until people refuse to s…
Political aka controversial topics should be avoided, unless they are relevant to work.
For example, unless you work at a real estate agency, it would be a poor idea to discuss federal or state law for racial guarantees around the sale of houses.
(Not that you can't discuss them; certainty do. But your workplace will make a poor forum.)