Why would it be racist to use the terms โ€œthugsโ€ and โ€œgangsโ€ to refer to white people? If anything, we should keep using them this way - decouple those terms from racial connotations.
Youโ€™re right, you should go make a conlang to be sure that none of the words you use have ever been said by a racist in a racist way.

it genuinely sucks that words change and become racist. the R word was meant to be the correct term. but assholes exist.

language changes, too fast if you ask me. but it does. we have no choice but to keep with the times.