If you’re going to use violence, be very smart about your targets who, where, how. You want those in power to fear, not the average gun toting American who is just trying to pay rent and buy food. If you make that population fear for their lives they won’t hesitate to kill you and in most of this country they could do so legally.
The Democrats did nothing about it while in power, plus Trump has said he’d veto a national abortion ban (for whatever that’s worth). Republicans know abortion is a losing issue for them, for example Ohio keeps voting for Trump but has legalized marijuana and voted abortion rights into the state constitution. Most voters have resigned to fighting for it at the state level, it wasn’t a presidential issue for them this year. And on other issues, Democrats weren’t convincing that they had much to offer.