This is misleading. There is only ever one group that threatens jews, and that is the majority population of a society or area. Whatever that group may be, is the target the jews go after. In white nations this is largely white people, its why the move niggers and spics and chinks and mudslimes in, to muddy the population and dumb it down yes, but also to create tension between all these different incompatible groups trying to live near each other.
Some groups however, specifically the lower intelligent and more prone to violence ones, are a larger threat when their populations get bigger in a given area. Mudslimes and niggers being the primary ones. Its why they've imported millions of muslims to europe, but they spread them out. In the US, its why they continue to shove niggers into white suburban areas, and gentrify black areas, to try to find the ideal balance, but ALSO why they keep black demographics low through abortion, indoctrination with music and "culture" that promotes things that cause their populations to stay stagnant more or less despite all their breeding.
Think of it like this. The majority population is their biggest threat at any given time, yes, and they seek to undermine it and take away its power so there isnt a large organized population that can oppose them, because different races dont work together on a macro level, so its to the jews benefit to keep the population percents at certain levels but with no clear majority winner, so that they can create constant fighting between those various groups. HOWEVER, it is MORE dangerous to them to have certain populations being to high, niggers or towelheads for example, in large numbers they have zero fear of calling out or attacking the jew. White people and slant eyes though, actually have enough intelligence to more or less find some kind of moral or ethical problem with this behavior, and thus they keep each other from doing it through social pressure. But nigs and dunecoons? No issues with it at all.
SO, thats why you see black areas being "whitified" lately, kikes have realized these truths, that niggers will go after the kikes, and so they seek to dilute the nog populations and spread them out more so they are less willing to attack, but also bringing in loads of spics and mooslooms to be able to lower the white population % of the nation but retain lots of racial/social tension that focus between those other groups and ignore the "small jewish population."
So, its misleading to say any individual group is the biggest threat to them, and saying which predefined group that is. In truth, the threat to kikes is always, and will always, be the majority population in an area. Some majority populations are more of a threat because they're quicker to violence and action, but ALL groups that become a large majority are seen as a threat.
The jew hides best when everyone else is fighting everyone else, and they can freely slink around the battle field selling snake oil and pick pocketing the stupid goyim. That is what they hope to achieve in the end. An eternal soft war between all other races, each at specific population amounts to keep them in check and from gaining to much power and stopping the fighting by eliminating their enemies and then realizing what the jews were doing all along and going after them.
