help with grammar doubts

0(1) This might seem a strange title, but I want to 01b00begin02b00---since I was asked to speak about disagreements of religion after September 1101sup^{00th02sup}00---01b00begin02b00 with a truth that anxiety itself is not against religious attachment.02br
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00Please check usage of two "begins" one before emdash and one after emdash.02br
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00(2) And 0100Persia0200, 00, where I come from, lost practically half its population and some 20, 30 million people were killed in this invasion.02br
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00Can 20, 30 million be changed to twenty to thirty million? Please clarify.02br
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00(3) And I will say at the outset that I do not believe that the September 11 events has had a deep effect upon Hinduism and Buddhism and Sikhism and Neo-Confucianism and Taoism and Shintoism and the other great religions of Asia, nor the primal religions of Australian aborigines or Africans or the Native Americans.02br
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00Can the sentence be edited like (bold are edits)?02br
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00And I will say at the outset that I do not believe that the September 11 events 01b00have02b00 had a deep effect upon Hinduism and Buddhism01b00,02b00 and Sikhism and Neo-Confucianism01b00,02b00 and Taoism and Shintoism01b00,02b00 and the other great religions of 00, nor the primal religions of Australian aborigines or Africans or the Native Americans.02br
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00(4) This statement of mine is based on what the <i>Manchester Guardian</i> and other Western newspapers have written, not on some conjecture by some Muslim extremist. Over 100,000 people, who have perished as a result of that act. So one evil act has resulted in another evil act, but the second evil act is hardly ever spoken about, because it is not seen as an evil act.02br
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00Should it be "who have" or "have"? Please check.0-