phrase requests - Idiom for "just because you give something a different name, it doesn't change what it is"

I'm looking for a way to idiomatically express the sentiment that just because you give something a different name, or precede it with a disclaimer, it doesn't change what it is, e.g.:

• "I mean this as constructive criticism, not an insult, but ..."


• "I'm not racist, but ..."


• "With all due respect ..."