My isfj brother is a pain

I've set a boundary by blocking him on whatsapp but recently he discovered he was unblocked and started messaging me again (he did it all the time before and that's why I blocked him). he married a woman who has a similar personality and build to me and who studied the same thing as me. he makes me super uncomfortable.

anyone else have this experience with isfjs?

I've been around 2 istjs and I don't get the same vibe from them. I actually feel a lot safer with istjs.