It really saddens me that different types of Jews cannot get along. There is a difference between acceptance and tolerance. One doesn’t have to accept the ways of another group of Jews, but one should be able to tolerate it without getting violent.
You NEVER EVER should scream or spit at another Jew that you don’t know, no matter how they are dressed. There is no justification at all to do that. You may not have to accept the Jews that don’t dress according to your standards (although you really should), but you MUST be able to tolerate it and live peacefully with each other. Otherwise, we are in for a very long exile.
Screaming at others is simply a lack of good middos. And if you keep all of “halachah”, and know Shas by heart, but lack good middos, it is worth NOTHING. Absolutely NOTHING.