Sure crassness isn't for everyone but it's a useful rhetorical device for breaking down taboos and shocking people out of their dreary complacency hence its employment by the alt-right.

I mean, the bikini lady is right to some degree, Christians and Jews just are not compatible. A crass display such as this is nothing but a turn off.

Not really. Jews have been making crass displays about Gentiles and Christians and the things they hold sacred in entertainment for nearly 100 years and people still see movies. This is the type of selective distaste that really bugs me TBH. Imagine actually looking at this society and complaining that it's the Alt-Right that is too crass. Baffling.

There are much more productive organizations actually working to preserve and celebrate European heritage in much more engaging and friendly ways. I mean, here’s a rando example: https://gahmusa.org/about-us/.

Yep and the group you mention has about as much actual power as your local Civil War reenactment society. Thanks but no thanks. You can't preserve your culture without having power. That's just how it works. Does the GAHMUSA have anything like the ADL? Do they work with law enforcement and government to enact training and legislative policy to help German Americans? Do they have the resources to monitor and harass people who say negative things about German Americans? Does GAHMUSA have a version of AIPAC where they lobby for foreign policy that is beneficial to them?

God bless them I'm sure they're lovely people but they are not 'effective' at doing anything at all because if they tried to people with actual power would crush them and call them Nazis and such. They're allowed to celebrate Oktoberfest and maybe dress up in lederhosen once in a while and if you want to do that then fine but you need influence and political power to preserve your culture and interests. The rest is just playing dress up for fun.