No, I'm pretty sure the games say nothing about Dante wanting to protect humans. If he did want to, he would've tried to save as many humans as possible in DMC4, when all those demons poured out of the hell gate. He didn't really seem to care. Though I'll admit that DMC1 portrays Dante slightly differently, as he shows strong, sincere emotion when Trish dies. But as for the rest, he is simply shown to like killing demons, and I never said anything about him wanting to kill all demons, so maybe you confused it with somebody else's comment. I see Dante feels that if he gets to save people, that's simply a bonus. Well, maybe bonus isn't the right word. He just goes: "good for you" and moves on. He doesn't seek attention, and he's made for killing demons, so why wouldn't he like it? He makes a living off of it, and gets to eat pizza whenever he wants to. Meanwhile, his shop pretty much stayed the same.
Look, no offense, but unless my memories of the DMCs are incorrect, I'd say you're... well... 'inflating' what little story there is, based on Dante and Vergil's background stories. Basically, I'm saying I'm not going to speculate about things that may or may not be true. Saying Dante wants revenge for what happened, well, when would he get his revenge, then? In DMC1, Dante kills Mundus, therefore getting his revenge. If revenge was all he wanted, he wouldn't have remained a demon hunter after DMC1 (in DMC4 and DMC2).
Look, no offense, but unless my memories of the DMCs are incorrect, I'd say you're... well... 'inflating' what little story there is, based on Dante and Vergil's background stories. Basically, I'm saying I'm not going to speculate about things that may or may not be true. Saying Dante wants revenge for what happened, well, when would he get his revenge, then? In DMC1, Dante kills Mundus, therefore getting his revenge. If revenge was all he wanted, he wouldn't have remained a demon hunter after DMC1 (in DMC4 and DMC2).