You have stated it quite well. One need only look through history books to see what comes next. EWTN aired film footage of Catholic Churches being destroyed under Stalin, the faithful fleeing with icons and sacramentals that were hidden in their homes. Priest 'holes' were also created and priests would travel under cover of darkness, by foot, to say Mass in those homes. Many of them were martyred for the faith.
This is the time for weeding out the unfaithful. The rest of us will soon go underground, much as they did in Russia and China.
>>>turn their sights onto their own Church
And I think the obvious weapon they will use is to politicize, divide, the Church. They already have their framework of “socialism is Christian” in several forms.
However this challenge is met, I think keeping the Church grounded as it always has been in spirit, keeping Her from being politicized is important.
IMHO, of course.