I hate to generalize but i’ve sure found this tends to the be the case
Crime/Punishment
Republicans want to kill anyone who is convicted of serious/violent crime. They’d rather execute innocent people who may be wrongly convicted but had received due process, than let 1 guilty person live.
Democrats would rather commute a death sentence or not allow capital punishment than risk that a single innocent person is executed.
Voting.
The Republicans spend lots of efforts trying to prevent democratic voters from voting over this horrific fraud they see everywhere. They are against early voting, absentee voting for anyone and anything resembling same day registration. Republicans go to court to prevent people who show up during legal voting hours from voting, if they can’t be accomodated before the scheduled “end of voting”. Republicans (and they’ve said it for years) say the right to vote doesn’t include having the practical ability to vote. So republican secratary of states, pull voting machines from democratic precincts, send them to republican areas just to hurt the democratic vote (Ohio in 2004)
Democrats want anyone who has the right to vote to vote. They believe people who got in line before the end of the voting period should still get to vote. Democrats have been accused of having dead people vote and actively bringing fraudulent voters to vote in multiple spots.
Whichever side you think is worse, “Democratic fraud”are always trying to get more votes for their side, while “Republican Harassment” seems entirely focused on preventing their enemies from voting.