Is my speech about Muslims, which was motivated by anger and by which I meant Arabs, considered an act of disbelief that expels me from the faith?

It is clear that the questioner is suffering from obsessive thoughts (waswasa). It is advised to avoid all such thoughts, to get rid of these ideas, and not to dwell on them. It has been mentioned that the best cure for obsessive thoughts, after seeking Allah’s help, is to ignore them and not to pay any attention to them. What the questioner said is not considered mockery of Muslims or their religion, because mocking religion and its people stems from ridicule and disdain. The questioner’s intense fear negates any notion of her disparaging religion and its rulings.