Death threats are wrong. Victims aren't to blame for death threats. On the other hand, that doesn't do anything to redeem systemd or dismiss criticism of systemd.
Unfortunately, now the meme will be that critics of systemd are dangerous lunatics because of the death threats that most critics of systemd never made or approved of. This (and procedural irregularities, etc.) exemplify the ugly "total war" tone that was instrumental in pushing systemd through. The death threats are inexcusable. But the poor tone and bitter feelings have roots in what was done to get systemd where it is today.
And if you are telling critics of systemd, who have nothing to do with death threats that "[they] are not welcome anymore in the community" - you are not contributing to the improvement of the tone. You are waging total war.