they will not left congress or nehruian school of partiesor socalled castist,language base parties.reason is constitution,deeply rooted nationalism.they fear to the surge of nationlistic patriotism like rss or their puppet BJP.communist belive that last struggle for power control of india is between left and right.extreme right is rss controlled organisations.at present communists are not powerful enough to win.so their strategy is to weaken the right by helping dead parties like congress,BSP,SAMAJWADI party,TDP,DMK
