it's a movie based on a comic book and you people are talking about continuity errors and saying that the first one was better. when referring to logical plots, you need to not refer to a completley ficticous character based on a mythical creature. the only problem i had with the plot of the movie was that once again, the evil guy wanted blade's blood. and my complaint is that it was unoriginal (as in the same as the first movie, not the whole concept which was unoriginal to begin with) not that it was unbelievable.
in case you had not noticed, blade said in the movie that he had known as soon as his young buddy had turned, which happened before the vampires came to visit with him the first time. therefore, he would have expected them to come at some point. also he was not exactly beating the crap out of them and he knew that there were more then two. so stopping the fight probably didn't seem like an all bad idea.
the cg sucked, i'll give you that
RE is a huge piece of crap.
as for the connection between blade and the chick, perhaps he had never considered the plight of the pureblood vampire. humans are their food, bottom line, to live they have to kill humans, a sentient creature. you would do it if you had to to live. had he ever got to know a vampire before? nope, in essence, blade is a racist in the purest sense, he kills simply because of what they are, never considering their motivations or caring about their sentience. perhaps he thought about that for a moment and realised that if he could save a human he would do it in a second, so why not save a vampire, because Frost was a psycho? not really a good enough reason if you ask me, or apparently blade.