Why did Bolshevik party accepted April …

The April Theses were first announced in a speech in two meetings on 16 April 1917 (4 April according to the old Russian Calendar), basing itself on Trotsky's Theory of Permanent Revolution. They were subsequently published in the Bolshevik newspaper Pravda. In the Theses,
1) Lenin Condemns the Provisional Government as bourgeois and urges "no support" for it, as "the utter falsity of all its promises should be made clear."
2) He condemns World War I as a "predatory imperialist war" and the "revolutionary defensive" of foreign social democrat parties, calling for revolutionary defeatism.
3) Asserts that Russia is passing from the first stage of the revolution—which, owing to the insufficient class consciousness and organization of the proletariat, placed power in the hands of the bourgeoisie—to its second stage, which must place power in the hands of the proletariat and the poorest sections of the peasants.
4 )Recognizes that the Bolsheviks are a minority in most of the soviets against a 'block of all the petty-bourgeois opportunist elements, from the Social-Cadets and the Socialist Revolutionaries down to the Organizing Committee
5 )Calls for abolition of the police, the army, and the bureaucracy and the salaries of all officials, all of whom are elective and displace-able at any time, not to exceed the average wage of a competent worker.