I agree with the first part, but getting Rs to ignore policy issues and focus on punishing SJWs is identity politics too. They're getting you guys to fight culture wars instead of focusing on policy.
Tell me, what are the widely held Republican policy positions that are popular with regular people? Because there is a ton that lefties agree on. So even if we were to agree that both sides engage in identity politics we'll have to part ways at the fact that Democrats like the policies of their political leaders and Republicans do not like the policies of their political leaders.
Low taxes
Reasonable regulation
Freedom of choice in a healthcare plan
Fighting terrorism
Responsible immigration
Punish criminals
Etc, etc.
If trumps positions weren't popular, he wouldn't be president. Literally half the country thinks you're an idiot, and half think I'm an idiot.
I'd argue the right is winning the battle for the soft Middle, even if they dislike trump personally. I'd base that of the fact republicans have won ever election since November.