I think that anyone who attempts a debate or argument via text message is being seriously immature, but that's not the point here. The question is, what is he yelling about? If he's going off on a tangent for no good reason, then no, that's not ok - he's not respecting you. However, if you've done something to seriously hurt or anger him then it stands to reason that he'd react that way.
i told him how i felt he said whatever then he wanted me to understand his point so i asked him to help me understand then he yelled text wise and said "i just told you my point" but the thing is i didnt understand.
I think this is a conversation the two of you should be having face-to-face. Texting is too impersonal and often difficult to interpret. Stop the text message and tell him you'll finish this conversation in person.
Definately...it's time for a face to face.