Question

So, I'm a Muslim woman living in the UK. I didn't go out since the 13 of this month because I was really afraid of getting attached by some racist, since it happened here a few times the last week. So today I left the house for the first time and when I came to the train station I was trying not to come to close to the edge of the platform and tried to stay away from white people (even though I'm white) especially men. But I didn't have to, I really was so frightened to leave the house. And the only white guy that was an asshole was a fat old man who stand in the middle of the way in a shop and when I tried to pass him he pushed his fat disgusting belly on me and I almost fall. He just ignored me and didn't even say sorry (I think it was on purpose anyway)

But here's the thing. I was afraid to get attacked by a islamophobic and I forgot that not everyone "attacks" physically. Instead I had 3 black Christian women looking at me (at different times and different locations today) and they were making this cross on themselves right Infront of my face. I find that so disrespectful, because I obviously am Muslim, and what is the meaning of that?

So to anyone who wants to let me know, why did those black woman do this cross on themselves in front of me??