No evidence given that Washington creates security challenges itself in order to blame Russia. A bilateral treaty between Russia and Ukraine, signed in 2003 and ratified by Russia in 2004, governs the use of the Kerch Strait and the Sea of Azov, which in the treaty are considered to be the “internal waters” of both Russia and Ukraine.
On November 25 border patrol boats belonging to Russia’s FSB security service seized two small Ukrainian armoured artillery vessels and a tug boat and their crews after opening fire at them, wounding several Ukrainian servicemen. It happened in the Russian-claimed territorial waters, rather than internationally recognised boundaries, after the illegal Crimea annexation by Russia, not recognized by international law.
The Ukrainian government asked for NATO's help in the Azov Sea. NATO asserted that its ships routinely patrol the Black Sea, and that regular air policing and reconnaissance flights are conducted there.
See more disinformation case on NATO and Kerch incident here.