Why did nearly all Republicans vote NO to extend tax cuts for those making 250K and less?

As to why, I'm not all that sure except to feather their own nests in some way and play bullyboy obstructionist roles that make no sense for this nation's well-being. Small businesses, President Obama has stated repeatedly, are the HIRING ENGINES for this nation's economy---if they do well they hire more people, and those hired people then pay taxes (revenue for the U.S.) and spend their earnings, thus growing this Republican-SHRIVELED economy! A vote against the middle-cl tax cuts is a vote AGAINST this nation's full recovery! Their EXTORTION tactics should FAIL---I really hope President Obama stands FIRM on his rejection of the $700-added-to-deficit Bush tax cuts for the wealthiest 2%! Senator Mitch McConnell (R-KY) is worth more than $49 MILLION on a life-long Senator's salary---and he filibustered UNEMPLOYMENT INSURANCE EXTENSTIONS. Bottom line is Republicans are only interested in themselves and NOT in what is good for the American people or the American economy.