The GOP majority is much smaller in Senate and some of the moderate senators think the bill would be destabilizing and prefer rolling back aspects of it: http://www.newsworks.org/index.php/local/politics/104772-on-radio-times-dodd-frank-overhaul-remains-trickier-for-senate-republicans

I don't disagree with that premise - that lack of all of those things is destabilizing - but that frame of thought is relatively new in the history of governance, and especially new in the United States.

Once the one industry had problems, so did the city.If we look at Churches through the same lens, then we should be worried about the destabilizing effects a mega church can have. 

If you have a stable income now, why try to destabilize it? 

The situation you speak of where you have “sophisticated” apartment owners whose lives and businesses are perfectly in order, and would never sell except for top retail value, yes that does exist, but there are plenty of other apartment property owners who don't have perfect business planning, who do make mistakes, and get themselves into situations where their property becomes destabilized .This happens with 20 unit buildings as much as it happens with 400 unit buildings.

If they were a tenant they can't make that happen and it destabilizes the home environment for their child. 

From their overview:"The goal of this task force is to address and eradicate unethical real estate practices and illegal activity that lead to neighborhood destabilization."

One of the other tenants wants to move into the apartment, which will destabilize her apartment giving them 2 free market apartments.

It can quickly turn into a portfolio destabilization event, and once that happens...

Major players in the information technology business could easily destabilize the bitcoin market by switching on and off huge networks of mining computers.