Jews are extremely ethno-centric as part of there culture. There is no conspiracy its just the way they are.
They care about jews first and put jews above all other ethnic groups. The promote their own interests where ever they go.
Some jews are not like this and just want to live their life, but there are enough jews that are ethno-centric that you can effectively ignore the outliers and still be able to predict the behaviour of the community.
Jews will hire other jews, in part because its easier to hire people who you know and are already in your network, meaning a jew is likely to hire Joshua from his synagogue because he already knows he would be a good fit and so putting out a help wanted ad is not necessary.
This phenomena of hiring inside your network is common to everyone, but disproportionately the networks of jews contain other jews, while the non-jews have much broader networks.
This naturally means that jews will eventually dominate certain industries without intending to just by the virtue of ethnocentrism.
Now this would not be so bad if the interests of jews were inline with the interests of non-jews, but sometimes they are not.
Jews like israel because jews, so they lobby the US to support it, even though israeli is a terrible ally that brings nothing but trouble.
Jews don't care about preserving the various western cultures they inhabit because they care about preserving jewish culture.
They don't need to be intentionally pushing degeneracy, but you need to realize is they don't care about non-jews so if degeneracy makes a quick buck they will promote it, since they send little Eli to hebrew school to get his values.
The culture of the host nation does not matter since they just have their own culture inside the host.
Even if the jews are not intentionally destroying us you need to understand that they just don't care about us. If the country fails they can just move to the next one.