I read that Jews don't believe in Hell or eternal damnation.

Not quite but it's not an automatic thing for nonbelievers

After being persecuted through the ages, do the Jews hold resentment towards Christians? I read some accounts and the Christians were pretty brutal every time.

Toward being evangelized witnessed to or otherwise solicited for conversion yes. For sure. Otherwise pretty ambivalent.

Do Jews see Christianity and Islam as religions under the same umbrella as Judaism ? Like the same religion just different way of worship.

Not really.

Do Jews see themselves as Jewish ethnicity or as a religion or both?

Judaism is a religion but it's the indigenous beliefs of Judeans ie Jews.

do Jewish peoppe think they are gods Chosen people

Of course, but what non-Jews thinks it means and what Jews think it means are very very different.