Not so sure about Southie, but when I lived in Westie, it was ultra-liberal. Even "Catholic" Memorial had a uniformly pro-abortion staff.
West Roxbury seems to vote overwhelmingly pro-life in Democrat primaries and races.
Southie, which is currently a mixture of blue collar Dems, yuppie Dems and white trash welfare collecting Dems, is liberal on every issue except for race and abortion. That will change over the next 15 years as the district becomes more socially liberal.