dont understand the sentence(how his reforming zeal matched by an impatience an intolerance?
"His reforming zeal is matched by an impatience and intolerance of dissent. Nothing can get in his way. Asked if anything can stop him, he told a US journalist: "Only death'"

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He has two strong traits not three, there are two "ands" that should be correctly read as ONE trait.
(by an impatience and intolerance of dissent.) is in one clause joined together by/with the AND).
Mohammed has misread the text. Ignored the writers no punctuation that is not separating the two conjoined by "and". 
Matched = equals / equaled.
It is a common mistake made by Mohamed and it could be rewritten to avoid the misreading.

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He has three strong traits. His (strong) reforming zeal is equalled by another two strong traits: an impatience (of dissent) and an intolerance of dissent.

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He has two traits, both very strong.  One is his zeal   The other is that he wont tolerate dissent