Please don't use the mind virus adage. That term is completely burnt by Musk's braindead agenda—there is no virus, if anything, there's opposing viewpoints that you may not agree with, but are just as valid as yours.
I'm a little torn, I see your point. I don't get to choose by myself how language and symbols are co-opted and used - see the whole "all lives matter" debacle that had many well meaning ignorant people spouting off racist garbage. On the other hand, do I really want to let an egotistical asshole - the very one actually fallen prey to the thing he claims so many others are victims of - dictate how I use language? There is a movement to reclaim words - or maybe not let them be misused - in a way that doesn't just roll over, hading over parts of the language, whenever fascistic assholes decide to appropriate them.
That makes sense. I’m not sure, though, if your argument really applies to terms made up (or at least coined) by said fascistic assholes; „Sieg Heil“ is very likely no phrase that’ll ever see any justification for using, even if somehow claimed by counter-fascists.
Then again, it’s probably a taunting metaphor to describe a certain ineradicable, flaming fanatism that cannot be tainted by facts anymore, which is what you used it for, so that’s that.