Poor little small businesses will always get crushed and it's just a matter of who by. I often see this kind of what-about argument trotted out against regulation (if we ban polluting cars, what about the poor folks who can't afford to get their old car serviced?). But if we're so worried about the pizza joint, are we going to protect them if a chain restaurant offers cheaper pizza? What if the neighborhood changes and now people don't like pizza as much? I think the answers to all these questions are the same.

There's probably a stronger argument for "it's just business" than forcing grandma to move out of the house she grew up in because she can no longer afford the property taxes. But, yes for better or worse, it's certainly an aspect of gentrification when the long time family-owned pizza place gets forced out to be replaced by a trendy bar, Starbucks, or a bank branch.

Yes?

Definitely yes.

Property taxes should be proportional to the value of the property. We shouldn't give special breaks to one group or another just because we like them more.

Seems alright to me.