The peo­ple described in the Bible are the ancient Israelites who lived in the king­doms of Kingdom of Israel and Kingdom of Judah in the Levant rough­ly 1200 – 586 BCE.
After major events like the Babylonian Exile and lat­er the Roman destruc­tion of Jerusalem in 70 CE, many Jews were dis­persed across Europe, North Africa, and the Middle East (the Jewish dias­po­ra). During that time: Jewish com­mu­ni­ties lived in many dif­fer­ent regions. They mixed genet­i­cal­ly to vary­ing degrees with local pop­u­la­tions. Distinct Jewish groups formed (Ashkenazi, Sephardi, Mizrahi, etc.). So the peo­ple who iden­ti­fy as Jews today come from many branch­es that devel­oped in dif­fer­ent places.

Modern genet­ic research has found that many Jewish pop­u­la­tions share par­tial ances­try from the ancient Levant, mean­ing they are relat­ed to the pop­u­la­tions that lived in the region in bib­li­cal times. For exam­ple, stud­ies often show genet­ic links between Jewish groups and mod­ern pop­u­la­tions of the Levant such as peo­ple from Israel, Lebanon, and Palestine.
However, Jewish pop­u­la­tions also show sig­nif­i­cant ances­try from the regions where they lived for cen­turies (Europe, North Africa, Middle East). So they are not genet­i­cal­ly iden­ti­cal to the ancient Hebrews.

The peo­ple in mod­ern Israel include: Jews from many dias­po­ras (Ashkenazi, Sephardi, Mizrahi, Ethiopian, etc.) Arab cit­i­zens (Palestinian Arabs) Druze, Armenians, and oth­ers So “Israelis” is a nation­al­i­ty, not one eth­nic line. the con­clu­sion Jews today descend part­ly from the ancient Israelites of the Bible is unsup­port­ed by any reli­able fac­tu­al doc­u­men­ta­tion or DNA ances­try test­ing. At the very best, 2,000+ years of migra­tion and mix­ing means they are not a pure or unchanged line. Modern Israelis are a mix­ture of mul­ti­ple dias­po­ra pop­u­la­tions plus oth­er groups that claim Jewish her­itage, not orig­i­nal Hebrew lineage.