Well, your experience is not everyones
It was only when I began lurking here that I learned that using the term Democrat was some kind of slur that signaled a right wing troll. Because I do not think I ever heard my grandparents who were all members of the Democratic party use the term Democratic.
They said democrat. As in I am a democrat. Or I am in the democrat party. And they were all raised dirt poor. Two of them did not finish elementary school and the 'rich' side of the family had 2 high school graduates.
They were working folks and they all created a much better life for their kids and grandkids. And they would have laughed in your face if you had told them that they were using incorrect grammar when talking about the party that enabled them to remove themselves from poverty.
So let us worry less about grammar and more about policy.
Have a nice evening.