You've built a straw man of alt-right beliefs that is not really representative of what they actually believe.

Nobody thinks there is a conspiracy or a bunch of Soros types sitting in a dark room puffing a cigar thinking about how to control the world.

The reality is that most Jews (whether religious or not) have a strong Jewish identity, that is completely separate from the identity of the indigenous people of whatever country they live in.

This, combined with an origin story more or less based around endless persecution as well as a culture of endogamy (e,g, not proselytizing, preferring in-group marriage etc), causes Jews to be extremely self-aware of their identity and concerned for the needs of their in-group.

This tends to manifest in Jews advocating for policies that benefit Jews to the direct detriment of the indigenous population of where they live. You actually reflect on this yourself in some of your comments, as you note that Jews used to be popularly associated with left (and far-left) causes, but as Muslim immigration increases more and more European Jews are now voting to the right: only 13% of British Jews intend to vote Labour. Of course, prior to London becoming plurality Muslim, Jews as a group were one of the biggest proponent for increased 3rd world immigration to England.

The Jews of course have less skin in the game there, as they can always make aliyah to the place they consider their real homeland. The ethnic English of course don't have that luxury.

You see this pattern (Jews advocating for increased immigration from foreign cluture groups) in most of the west. In fact, one of the major traffickers of "migrants" into Europe is an Israeli NGO called Israid. Given the aforementioned history of persecution, Jews tend to prefer multi-cultural societies as they feel they won't be the sole focus of attention as a successful out-group.

Of course, Jews don't advocate for bringing refugees to Israel, much less creating a multicultural society at all. I believe it was even Ariel Sharon himself who coined the term "Demographic Threat" when explaining that it was necessary for Israel to have a Jewish majority because any other demographic balance would threaten their democracy (as they understand Muslims will vote as an ethnic block much like blacks, latinos etc. do in the US and Muslims do in the UK. Over 80% of Muslims in the UK vote labour.

Anyways I don't want to write an essay, but hopefully you understand the perspective of people who are wary about Jewish influence.