Claudio is deeply suspicious of others, for no good reason. When Don Pedro asks Leonato for her hand for Claudio, Claudio immediately believes Don John's suggestion that Don Pedro is after Hero himself, and that Hero would instantly change her affection to Don Pedro. He is also instantly ready to believe that she spent the night before her wedding in bed with another man when Don John proposes this (although with some fairly persuasive trumped-up evidence). Nevertheless, if he knew Hero he would be skeptical of the suggestion that she was unfaithful and not so willing to believe the worst of her.
One cannot help thinking that he will make Hero a poor husband.
As for Don Pedro, he does not have any particular reason to assess Hero's character one way or the other, but he does know the character of his brother and should have been skeptical of anything Don John said, since he was a proven liar and troublemaker.
He backs up Claudio's claim that Hero is not worthy to be his wife.
that don pedro is pursuing her (apex)
That Hero is unfaithful
Pedro supported Benedick in his love for Hero.
Don John was born out of wedlock, he feels like nobody deserves to live a happy life, or get married. Also, many people think that Don John actually loved Hero, so was jealous of Claudio;and felt like since he couldn't marry Hero, Claudio shouldn't be able to either.
plead Claudio's case to Hero and Leonato.
He backs up Claudio's claim that Hero is not worthy to be his wife.
that don pedro is pursuing her (apex)
That Hero is unfaithful
Pedro supported Benedick in his love for Hero.
Don John. He does a fine job of it, too.
That he convinced Don Pedro and Claudio of Hero's infidelity.
hero for himself
Don John was born out of wedlock, he feels like nobody deserves to live a happy life, or get married. Also, many people think that Don John actually loved Hero, so was jealous of Claudio;and felt like since he couldn't marry Hero, Claudio shouldn't be able to either.
Hamartia
The hero makes a mistake in judgment.
Don Pedro says that he will propose the marriage of Claudio and Hero to Leonato her father and get his consent. This he does. Claudio is grumpy because he has been fooled by Don John into believing that Don Pedro wanted Hero for himself.