Yes. Torah-observant Jews purchase bread (and any other processed food) with a reliable kosher-certification on the label.
of course they are allowed they just have to be respectful to our Jewish traditions.
yes
No, however not all Jews follow the Jewish dietary laws.
Why would you want to? No law against it, but people would mistake you for Jewish.
Challah is Jewish bread.
...of course.
Yes, even on Shabbat.
There are no Jews living in Jordan, Jews aren't allowed citizenship in Jordan. Jews are allowed to travel to Jordan but these days there aren't a lot of Jewish visitors to that country.
The Nazi Party of Germany allowed the Holocaust to happen so the German people would be unified against the Jewish people.
Yes, but in time they had to surrender them.
Of course, there's no prohibition against holidays.
There is no prohibition against bringing non-Jews to an Orthodox synagogue or otherwise, it happens all the time.