i think south indians are more manipulative. i have personally seen this. they are also more groupists. bongs, southies, marathis, all are groupists full of inferiority complex who try to show others down because it makes them feel good about themselves. 'north indian' is too much of a generalism as that is too much of an area that also covers kashmiris, paharis, himachalis, haryanvis, other than upites and biharis. also, because of casteism in up and bihar, thes people actually do not group together all that strongly.
i agree that some of these are bad elements and should be thrown out of the country itself (but are the fruit sellers among them??) but what i don't understand is how come they are doing goondagiri in MH? that means that MH is a weak place or their police is corrupt (which is a known thing).
also, i feel that it is unfair to blame biharis for everything. they have gone through a bad phase when people actualy went against the imposition of president's rule (which would have been the right thing) - the state lost everything. People like me left over ten years ago and cannot really go back to that state any more. however, not everybody is an assimilator like me. I do support it if the elements who don't weant to adjust are thrown out but blaming all biharis is not correct.