monta
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I think the main idea is not to look like a hypocrite... moreso than limiting freedoms to feel however one wants about an issue. Naturally, many decisions go into voting, more than just being black or white. Many people feel many ways about many issues.... but one must also realize that not standing behind whatever values one does have can make life that much harder if you want someone to listen to you.
PS sorry for this minor digression... I don't know what I am on the political scale...
If you have only two things to choose from there is no real choice. It's like asking if you want tea or coffee, and if you pick tea, then you can't ever have a cup of coffee or a slice of coffee cake or milk, and you must like lemon .....etc