I saw their comment and frankly I think it's a perfectly reasonable sentiment. That objecting to incarceration practices in America is viewed as contributing to a "political flamewar" by the mods here is surprising to me.
"[F]acists" and "concentration camps" are intentionally incendiary and do not promote a constructive discussion. There is nothing reasonable about that wording at all.
These are descriptive terms for what currently exist in the US (and have existed before in the US). If hearing them causes you to feel emotions that don’t allow you to engage in civil discussion I think it’s worth investigating why that is —- not insisting we find less precise terminology.
