I'm again and again surprised how the "truth loving" GLPers handle the truth when it doesn't fit their agenda.

Thus once again: Breitbart Fake News.

The veiling or covering of crosses and religious statues from Ash Wednesday to Easter is a centuries old tradition (not only) in the Roman Catholic Church. It's called "Lent": [link to en.wikipedia.org (secure)] Mostly violet veils are used but also white and black veils.
It has nothing to do with surrender to Islam as some right wing agitators are telling you.

And "motorised blackout curtains" are used for the same purpose: "This black curtain always remains closed during mass and the Lenten offices, symbolizing the expulsion of Adam and Eve from Paradise. It is not opened until Palm Sunday." [link to sicutincensum.wordpress.com (secure)]