I am not surprised.
Have been fighting this for a long time.
Talked with my local ISP (phone coop) and it is an issue outside their network. Google is their supplier of email and internet feed.
I am unsure where the real filtering is done. I don’t believe it is from Google. (not generally a Google fan, but lately Google and Twitter both have been trying to reduce this)
I anticipate conservatives will have to go off the web to something like usenet.