Complex sentence: Both parliamentary blocs pledged not to seek support from the SD with both blocs regarding the Sweden Democrats as xenophobic and as holding views that are incompatible with commonly held notions about the equality of persons regardless of their national origin or ethnicity or religion.
Split into simpler sentences: Both parliamentary blocs pledged not to seek support from the SD. The two regarded SD as xenophobic and of holding views that are incompatible with commonly held notions about the equality of persons regardless of their national origin or ethnicity or religion.