Those are two distinct subject matters.What about the Atheist "Soviet Russia"? It is an Atheistic Society and a "secular" one also. Is it more equitable than say the UK or the US?
Regards
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Article 14
1. The Russian Federation is a secular state. No religion may be established as a state or obligatory one.
2. Religious associations shall be separated from the State and shall be equal before the law.
The Constitution of the Russian Federation
Soviet Russia no longer exists as such, and while it did nominally promote atheism, it is plain to see that it never managed to somehow convince the people to be atheistic. All those Russian Orthodox Christians came from somewhere.
It had three Constitutions, from 1924, 1936 and 1977. It should be noted that apparently all of those nominally valued freedom of religion, although I don't think that translated very well into actual practice:
Constitution of the Soviet Union - Wikipedia
The current Russian Federation is in some ways the successor of Soviet Russia, and in other ways a departure from it.
It is that Federation that has the Article 14 that you quote above, and that may be consulted at Chapter 1. The Fundamentals of the Constitutional System | The Constitution of the Russian Federation as well.
The Russian Federation is (at least nominally) a secular state, as pretty much every government should strive to be. That in no way implies that its society is devoid of either religion nor belief in God. It just establishes that the government is not supposed to take part in religious matters.