Why muslim did not willingly participated …

(i) Some of the Muslim political organisations in India were also lukewarm in their response to the civil Disobedience Movement.  (ii) After the decline of the Non-cooperation and Khilafat Movements, a large section of muslims felt alienated from the congress.  (iii) The important differences were over the question of representation in the future assemblies that were to be elected. (iv) Muhammad Ali Jinnah, one of the leaders of Muslim League was willing to give up the demand for separate electorates, if muslims were assured reserved seats in the central assembly and representation in proportion to population in the muslim dominated provinces.  (v) Negotiations over the questions of resolving the issues at all parties conference in 1928 disappeared when M.R. Jayakar of the Hindu Mahasabha strongly opposed efforts for compromise.Read more on Sarthaks.com - https://www.sarthaks.com/37642/why-did-muslim-community-join-struggle-during-civil-disobedience-movement-give-reasons