Contrary to what you believe, or wish, Article 25-30 are meant to provide constitutional safeguard to the minorites. This has been explained in brief by @
Joe Shearer.
As evidence to your claim that '
Sikhs, Buddhists and Jains are not given a separate religious status through application of Indian constitutional clause enacted through Article 25 of Indian Constitution' you have cited a Supreme Court case, as reported by an Indian newsportal. What you don't know, because a brain as prejudiced as yours can never pick up the clues that go against your prejudice, that the case has absolutely nothing whatsoever to do with Article 25.
The case - Bal Patil v/s Union Of India & Others [case no: Appeal (civil) 4730 of 1999] is about the applicant seeking the Central Govt. to declare Jains as minorities. The case was rejected on the ground that it should be done through 'State Minorities Act' (State here means province) and not 'Central Minorities Act'. Even by the most imaginative stretch of mind can it be said that '
the Supreme Court has declined to treat them as separate minority communities from the broad Hindu religion', unless of course you are you (or that ignorant reporter you have decided to rely on). The comment of the Judges that you have highlighted in red, are in connection with how these religions are perceived in broader Indian society and are
not an explanation of the legal status of these religions.
The Central Government has expressedly declared who the minorities are. According to Section 2(c) of The National Commission for Minorities:
"Minority, for the purposes of this Act, means a community notified as such by the Central Government"
The notification [SO no. 816(E), F. No. 1/11/193-MC (D) dated 23.10.1993] states:
"In exercise of the powers conferred by Clause (c) of Section 2 of the National Commission of Minorities Act 1992 the Central Government hereby notifies the following communities as 'the Minority communities' for the purpose of the said Act. namely:
1. Muslims
2. Christians
3. Sikhs
4. Buddhists
5. Zoroastrians (Parsis)"