I mean, both parts are unnecessary for the larger conversation. Going "haha he's copying the GOP" doesn't accomplish or contribute much (and trust me, I can't stand the GOP either). So is the "both sides" argument, and its inherently dismissive, by going "yeah but both sides do it!" Implies that if the original person WAS making a factual statement about the "GOP playbook", that it would be completely acceptable because "hey the other side is doing it too!". Overall very unproductive conversation for everyone involved and poor word choices