Vengeance faggot. It is a core component of white's. Shitskinns don't seem to actually understand this, their idea of it typically comes down to personal drive for respect and wealth. So lets lay it down for the ignorant.
If the system comes down due to fucking Jews. MILLIONS upon MILLIONS will die. Revenge for the loss of loved ones will make that fear a non starter. My family is dead anyway, I have no connection to any others due to Jewish cultural war. No tribe no link. Nothing but hate and savage bloodlust. It is instinctual in whites to destroy those whom have already destroyed everything of yours, it is how our fucking genes evolved themselves to cleanse itself of shitskinn corruption. So that fear has no link to 'us' that would use it.
Next. Nothing is perfect, especially when connected to genetic and biological systems. An engineered weapon that can wipe out 100% of the population is almost impossible. Maybe eventually something can be setup, but for now, it is not even in the realm of reality. Thus even an specifically targeted weapon will not destroy all of the target, not directly anyway. Jews being an parasite makes complete elimination more likely. Both its fear and mechanism of infection will be effected, even the fear of 'this disease' spreading will be enough to force other populations to target jews and exile/destroy them. Making things even harder on such a pampered race.
Could it mutate and wipe out the carriers? Sure. But also, nature is on 'our' side. Namely huge numbers will by the mechanics of nature, be immune. More so if you engineer it correctly with the view of its evolution. You being the creator could even engineer an counter to it even more veracious in killing your targeted disease off. Once evolution begins things are on their own. No reason to fear what cannot by nature be controlled.
You may as well fear that a wile strain of yeast will mutate to kill off all humans instead. It by its nature actually has a high chance of doing this compared to something that is likely very specialized. But again, nature have natural ways of ensuring plagues of all types are dealt with. Humans as a whole are unlikely to be wiped out by any one weapon/disease. Get enough factors running into each other and it could be a problem, but many factors actually start working against each other at a point.
There is a reason our imperative is to expand to fill all possible niches, even if it will eventually collapse our population again. The wider your spread, both physically, genetically, and culturally, the more resilient you are, and less apt to be destroyed. That is why such a specialized parasite like Jews are so likely to be the easiest to target this way.
Their continued intermarriage, cultural linkage, parasitical practices, and close racial focus has ensured that what little drift they obtain by breeding with Goy's will not be enough to salvage their peoples from such a weapon. Hell, that go out and breed with the goy thing may be a very real genetic drive to ensure inbreeding does not take too much root, while also doubling as a camouflage to assist its parasitical behavior. That may also be the only thing that will save any of them from the weapon directly, since some of them will take more ques from the goy side than jew.
Also. Fear of something in war. Lol. Familiarity breeds contempt. Drive for vengeance breeds a welcoming view. Fuck, we has a slight risk nukes could chain reaction itself and burn the atmosphere of the world up with one bomb. We didn't even pretend to wait for a 'last ditch' effort before we used it.
Weak pampered children fear the unknown when a direct threat is breathing down your neck. Do you think my pic's gladiator gave two shits about the age old fight between western civilization and eastern enslavement? Fuck no, he was an slave, and entertainer, and warrior who only cared for surviving his next challenge, pleasing the crowd, and fucking hot wet cunny. But if you had offered an way for an slave in the mines to exterminate his most hated enemy, at the risk that eastern empires thousands of miles away may eventually cross to attack his great great grand children, he would hesitate to unleash hell upon genetically similar Roman genetic stock, for even one passing moment?