The main reason to reject Kamala Harris is her voting record,,, period... no need to go beyond that... or look for any other reason...
Want an excellent Presidential candidate who just by chance happens to be a woman and of Indian minority ethnicity wait till 2024 and vote Nickki Haley for President.
We don't need a minority woman as President or Vice President, we need someone with sound political ideas and policies in that position and Nikki Haley fits that description. As both a governor and UN representative she excelled... want a great Vice President on the ticket, go for
Condoleezza Rice who happens to be African American.
Bottom line, if a minority woman in the White House is a "big deal", then save your vote for one that would make a great President or Vice President. But it is racist and/or sexist to vote for someone based on their race or gender. Whether that means you prefer "old white" men like Biden or younger "minority women" like Kamala Harris.
Don't let identity politics including race or gender influence your voting record... pick the person in the best position to face the issues facing the country... hard to think of Biden or Harris fitting that description based on their voting records.