The answer to all your questions are in the affirmative. Pl download free copy of The Koran from Project Gutenberg, read it and understand for yourself.
The Koran contains contradictory verses which can be interpreted according to the convenience of the interpreter. While the good muslims quote the good verses, the religious fanatics quote verses like "go and kill the non-believers wherever they are found, etc" in support of their skewed perceptions.
