CPI-M General Secretary Sitaram Yechury on Friday accused West Bengal's ruling Trinamool Congress and opposition BJP of practising the same sort of religious extremism and communal appeasement and said the two forces were feeding on each other."It seems the Trinamool Congress and the BJP are wrestling against each other here in Bengal, but fundamentally they are practising the same sort of religious extremism and communal appeasement. One party is aiding the religious extremism of one community while the other party is resorting to appeasement of the minority," Yechury said here."The cow vigilantes are killing the Dalits and Muslims in the name of cow protection and somehow the killers do not come under the ambit of law instead. The BJP is doing the dirtiest form of politics by trying to consolidate the Hindu vote banks. "On the other hand there is political parties like Trinamool Congress that is encouraging the Muslim extremists to strengthen its political position in the state," he alleged.Yechury claimed when such situation arrives, there are constant efforts to squeeze the leftist and secular space and that is exactly what is happening in Bengal.Referring to the massive communal clashes in Bengal during the time of independence as a "black chapter in the state's history," Yechury said Left is the only political force that was able to form a society on the basis of secularism and brotherhood.Yechury said Bengal has had a revolutionary and progressive history and claimed that if the ideals of revolution by the working class people against capitalism became powerful in Bengal it would surely gain steam in rest of the country.