Of course they are. People who introduce religion are very well educated and creative in inventing methods of manipulating masses. Priests were known for trying to understand nature but not to share their knowledge but to use it to enslave mases like eclipse for instance.
I don't know if that could be supported. For one, we don't have records of various religions being founded. Second, if we look at Christianity, it was founded by accident. It wasn't trying to manipulate the masses, but save them from what they thought was the end of the world (just look at Paul).
Maybe some individuals have used it to manipulate others, but one example simply does not support the idea that religion was created for that purpose. Or that those who introduced religion intended that.
Of course they would, I didn't say it was good I said that that kind of behaviour is characteristic for most religions, kill thse that think differently, this s the essence of religion instead of discussion who is correct.
Not really. Especially if one looks at modern religions. There are many religious talks between all sorts of religions. They may not be discussing who is correct, as that isn't always the question (or one that even matters), but there are many such dialogues.
One historical event can not characterize an entire religion.
When someone has some new idea which questions current truth this new idea is being discussed rather then killing the person that pruposd it. Science confronts different theories and discussses which one is better through the things you mentioned.
Religion, for the most part, does just the same thing now as well. You are too focused on the past, and the simply truth is, things have changed greatly.