No. Some religions see themselves as the one true path and believe they must convert the non-believers, but this doesn't mean they're right, it's just their views. You can follow anything you want if you feel it's right to you. Not every religion preaches the same thing, so to someone who believes in reincarnation, being threatened by hell is like saying 'if you don't like anime Godzilla will attack you.'
If you choose to convert, make sure you do it for the right reasons. Soul search, research, and decide on the one you feel drawn to because it feels right. Don't go with superficial reasons like holidays, spell casting, to show off/rebel, or to fit in with others.
Many will not understand. My cousins just converted from Salvation Army to Baptist [both Christianity] and many people in their own church are spreading rumours as to why. Even though they explained they soul searched and felt Baptist represented their views better. At some point you stop listening to others opinions, you'll be much happier. To quote Dr. Seuss 'those who mind don't matter and those who matter don't mind.' Just do what's right for you [provided it isn't something like kicking puppies]
No it's not its your life your choice. I hate when people say because of my religion you can't do this. It's your choice don't listen to people who talk crap because of your religion.
People fear what they don't know. When they hear 'witch' they go with Harry Potter or the Wicked Witch of the West [never Gilinda the Good Witch] and its so ingrained in our culture many refuse to believe you when you try to explain. Best to be nice, but don't waste your energy on useless causes. A brink wall is easier to walk around than smash your head against it in the hopes of breaking through.
No, it is a Christian path, they do charity work as well. My cousin married into the church and her husband was not only a minister for the Army but the son of a minister. I was at their wedding, I went to their church, I met their ministers [and I don't know if it was for the wedding or all the time but the ministers dressed in army uniforms] The Salvation Army also has a few different rules, such as abstaining from the consumption of alcohol, avoiding establishments of 'sin' [like bars and occult stores] and agreeing to do whatever necessary to convert those not in The Army [that was actually in their wedding vows]