I know most of it's probably just joking around here, but let's see: would you vote for the side that refers to you as someone who just wants their "gimmies", or is just a stupid criminal/terrorist/druggie/leech/harpy, etc? C'mon now. That's just plain fucking common sense.
And it's not just on the right, either. Prime example would be Hilary Clinton's comment about Trump supporters being a lot of "degenerates". Now would she have won if she hadn't said it? I don't know. I DO almost certainly believe it was a major factor in her losing the election. Whether it was true or not, you don't fucking say things like that.
I think the coming of the religious right in the 1980s really hurt the Republican party with women. Now, once again, a lot of people on the left need to stop lumping all Christians in with fundamentalists. Just like not all Muslims are terrorists, nor are all Christians a bunch of gay-hating fundies. BUT, the religious right does hold a lot of sway with the GOP, and it has definitely alienated women. I'm not going to vote for a politician that wants to take away not only my right to choose, but also in many cases think that birth control should be restricted as well. (Rick Santorum used to be my senator -- 'nuff said)
Tying yourself to a group that believes men should be in charge is going to turn women away.
About the whole "Party of Lincoln" thing. I read a comment the other day -- I can't remember where, so don't ask me to link to it. But someone basically pointed out that if you have to go all the way back to the 1860s to find an example of your party helping minorities? That's not really a point in your favor.
Speaking of "gimme", that's also not exclusive to the left, or minorities. Plenty of white people are on welfare, and hasn't it been shown that welfare recipients live mostly in red states? And forget welfare.
How much bitching do we hear about tax breaks for the wealthy? Corporate bailouts? If it's greedy for the guy down at the bottom to want to be paid a decent wage, why isn't it just as bad for the guy at the top who's just fucked over an entire industry to ask the government to bail him out?
Finally, the left tends to be the side of the under dog, and traditionally, that's where minorities and women have stood.
Look, I know this place has a lot of Trump fans. But you can't deny the dude has said some pretty hateful things about women and minorities. If someone called ME a criminal, or a terrorist or some shit like that, then good luck getting MY vote.