There isn't a "jewish" way to act. There is merely self interest and self sacrifice for the benefit of others. All different cultures have varying levels of self interest. And all individual members of duffering cultures have their own level of selfishness/selflessness. The jewish people are a phenominially self-centered people. Probably the most self centered on the entire planet. They teach each other that ONLY jews matter. They only care about themselves as a cuture. And within the culture the individuals (individual jews) manifest the same selfishness towards other jews that their culture manifests towards non-jews. The world jews birth around themselves is a world of total selfishness and self focus. Jews only know how to build completly selfish worlds. This is why every selfish person we know, jewish or not, will appear to us to be acting "jewish" because modern judaism is little more than internalized selfishness and focus-on-self masquerading as as culture when all it really is fundamentally is a group of people acting selfishlessly.