[ZGDUwpqEWpUZ]

Accusing someone of deliberately derailing a conversation when they're doing no such thing is obviously going to be taken as an insult.

You can question the relevance of a comparison without questioning the integrity of the person bringing it up: say it's off-topic and explain why.

More often than not, accusations of "whataboutery" are used to avoid having to explain why something isn't relevant and thus avoid addressing whatever point is being made. I'd go as far as to say it's why the word even exists.