Political leaders are expected to conduct themselves appropriately in public view because they are selected to represent all of their constituents. If a politician makes an appearance on live television and says something that is offensive to their constituents, they can expect political repercussions regardless of what anyone else said on the TV show.

That other people in the debate compared a Shivling (https://en.wikipedia.org/wiki/Lingam) to roadside signs and poles does not excuse Nupur Sharma from the repercussions of what she said. Sharma made comments that she knew would be offensive to a religious minority, and she was expelled from her position as the national spokesperson of the Bharatiya Janata Party because that was not the behavior the public expected from a high-ranking political figure.

https://indianexpress.com/article/india/bjp-suspends-nupur-s...

When someone like Mohammed Zubair makes a supercut of Sharma's comments to highlight the fact that a politician is not appropriately representing her constituents, it's not Zubair's fault that Sharma made those comments in the first place.