Orthodox Jews rarely accept converts, but if they do, they require several years of intense study.
No Jews, regardless of level of observation, seek converts. However, if people wish to convert, Orthodox Rabbis will assist them after being convinced that the potential converts are sincere in their actions. That being said, most Orthodox groups, especially Chassidim, try to get non-observant Jews more involved in Judaism.
Orthodox Jews believe their way is the only "proper" way to practice Judaism. In most cases, it's considered brainwashing.
On the contrary, it's the only branch of Judaism whose numbers are increasing. Besides, Orthodox Jews (or any Jews) are not the type of people to brandish deadly weapons. Orthodox Judaism has been around for many centuries and will continue to be.
People who choose to continue the ancient traditions of Judaism.
Hasidim are a portion of Orthodox Jews. They follow Judaism on a strictly Orthodox level.
Hasidic Jews are a subcategory of Orthodox Jews. The majority of Hassidim wear long coats, while most other Orthodox Jews wear regular suits. On Sabbath and festivals, Hassidim wear a fur hat called a streimel, while other Orthodox Jews wear hats more similar to standard styles.
Yes. My maternal grandmother was Orthodox and married a Reform Jew and she switched to Reform Judaism.
Yarmulkes
Haredi Jews are ultra orthodox Jews found around the world.
Technically, there is no conversion required for the vast majority of Orthodox Jews who might want to be accepted into a Reform congregation. If an Orthodox Jew shows up in a Reform congregation and takes part in a service, they will be counted as fully Jewish without question. The great difficulties come when Reform Jews get interested in Orthodox Judaism, because Reform accepts as Jews people who are not considered as Jews by the Orthodox -- The Orthodox to not recognize the legitimacy of Reform conversions nor do they recognize as Jews those who claim Jewish status through patrilineal descent.(OK, there is one difficult class where Reform Jews might ask for conversion. The child of a Jewish mother and a non-Jewish father who grew up in a non-religious household would be welcome as a Jew in an Orthodox congregation but might face questions in a Reform congregation because, technically, the Reform acceptance of patrilineal descent is contingent on having a religious upbringing.)
They don't try to 'convert' anyone. They try to interest them in religion.
Not for Orthodox Jews, but the other branches of Judaism allow it.