For one, this great imperial power came and occupied the Jewish land. Initially, it was a protectorate preventing the Persians from swallowing the Hashemonian kingdom, but then, they took over, and suddenly, there were legionares enforcing Roman rules, drafting laborers to build roads an aqueducts, and tax collectors sending money off to support purposes known only to Rome. How would you react? Some saw the roads, aqueducts and "pax Romana" as opportunity and made money as merchants, profiting by the Empire. Some people, to keep their positions of power, made compromises with Roman rulers, becoming collaborators in the eyes of others, some did their best to ignore the situation and just get on with things, and some grew increasingly resentful.
As the resentful ones, the zealots, became active, Rome responded with oppression, leading to the classic spiral of oppression and rebellion that occupying armies have sparked time and again over the years. In the year 68, the flash point was reached, and there was revolt, the Romans were driven out, and Rome responded with overwhelming force, bringing in legions from across the empire to crush the revolt. The pot came to a boil again in the second great revolt, under a brilliant general, Simon bar Kochba, who was proclaimed to be the Messiah and who again drove Rome out. Again, Rome eventually crushed the rebellion, but at huge cost to the Empire and greater cost to the Jewish community. Rome killed, enslaved and expelled the Jews of Jerusalem and vicinity, and permanently forbade Jews from living there.
Why did they what? Complete questions usually get better answers.
The Jews revolted
Romans were polytheists while Jews were (and still are) monotheists.
Because religion fosters war and conflicts. There is no conflict between Jews and Muslims as such. There are conflicts that pit Jews and Muslims against one another, such the the Israeli-Arab and Israeli-Palestinian Conflict, there is no Holy War by either religion targeting the adherents of the other.
the jews hated the romans
After the Romans banished the Jews from Jerusalem, the Romans renamed the city Palestine.
No the Romans did not force the Jews to worship their gods.
Romans don't like Jews because of their beliefs. So, they concocted a plan to attack them.
On the contrary, the Romans destroyed the Jewish Temple, sacked the city of Jerusalem, and banned the Jews from entering that area. See also:More about the Romans and Jews
The Punic Wars.
There is no particular conflict today between Jews and Germans. In fact, Jews from many countries in the former Soviet Union are settling in Germany. Germany also provides Israel with numerous subsidies and the two countries trade extensively.
the Romans
You have your facts a little twisted. When the Romans existed, there was no Islam. The Romans forced the Jews from Israel (not Islam) in the year 70 and the result was the "Diaspora."