The big deal is that this makes it seems like Synth is a guy who completely folds on his beliefs and gets flustered when confronted with a little female attention, including from women whose behavior he should mostly find disgusting according to the values he previously portrayed. She isn't even physically there, it's a cartoon representation of her and he's falling over himself to make her not get upset.
If he wanted to just not have the creator get shit on he could have calmly said he's going to extend some curtesy to the guest by not reading superchats with insults in them or whatever. Could have also just told Kirche to ignore it or deal with it, she knew what she was getting into. Might be a foreign concept to some but extending curtesy doesn't mean folding like origami when someone shows you a bit of attention, and some people aren't even worthy of extending it to.
Egard probably has an unironic race-mixing fetish, I've seen that type of trad Christian before.