I do not see these crosses as emblems of religion, but I think it’s possible that someone could.
I also like Ann’s thinking that if we eliminate the color change that’s 14 fewer ends to weave in on each square–to which I say a non-religious hallelujah!
Here’s a link to one of many versions of the Mitered Crosses Blanket over on Ravelry that omitted the color change. It’s beautiful, and there are many more like it.
The mod to the pattern is simple: when it says “change color”——DON’T DO THAT. Keep going until the miter is done, then pick up for the next miter. YOU DON’T EVEN HAVE TO CUT THE YARN AT THE END OF THE MITER.