In theory, yes, but in practice it's only considered "rude" when you bring unpopular political views into the workplace. In a partisan locale such as SV people openly talk about the popular political view at work, all the time.
A Googler can go to TGIF Q&A and openly bash Trump/GOP and he'd get sympathetic responses from Larry, if not cheers from the audience (and a bunch of new memegen entries), but I highly doubt the same would be true for someone expressing opposite views.
The stuff rude awakenings are made of…
Similarly the Brexit vote revealed alot about people's true characters and beliefs. The vote largely broke down along class lines, working class for Leave, middle class for Remain. And those middle class types, who tirelessly virtue signal about how left-wing they are, when confronted with what the actual Workers really want, are quick to condemn the entire lot as racist mouth-breathing, knuckle-dragging morons. Class divisions are never far from the surface in the UK.
But sometimes sensitive topics become relevant in the workplace (e.g. diversity in hiring). If any suggested divergence from the party line is repudiated, we risk losing objectivity.
An open mind easily discards a bad idea. A closed mind may miss a good one.
FTFY