The fact that you don't see Jews in the workplace etc is proof that the majority have integrated. Most Jews dress entirely western, speak only English, many eat in places like Mcdonalds. Unless observant, most Jews are unrecognisable as Jewish or distinct from the rest of the population.
The only group which don't integrate is thr Hasidic (the ultra-Orthodox.) But still, they don't committ terrorist attacks or try to convert people to Judaism. Unlike Muslim extremists, they're harmless.