Which empire did the Safavids defeat
and take over for some time?

answer: From their base in Ardabil, the Safavids established control over parts of Greater Iran and reasserted the Iranian identity of the region, thus becoming the first native dynasty since the Sasanian Empire to establish a national state officially known as Iran.

i just did something on this guy a few days a go give me two minutes to find it in my notes.

so they can differentiate themselves from others as they saw themselves as the superior race. the star was basically a symbol that meant you are a less of a person than i am because of my race. the star was also degrading for those who had to wear it because they were aware of this and the nazis used the notion to make them feel less like a person.