My own dad's dad wasn't that involved with him when he was younger and was by all accounts not very nice to my grandma. As a result I never saw my dad's dad much as a kid.
Now I have a young child, this man's great grandchild. The one time I went out of my way to take my kid to see him, he and his partner told me I wasn't dressing my own child properly, and waxed lyrical about how wonderful and perfect my dad's step-sibling was as a child. The whole experience made me very uncomfortable.
With kid no2 on the way, my dad's dad is messaging me again asking why I haven't taken DC1 to see him. The answer I have is that he never asked, to which he replied that he thought it was "implicit". I am a working parent and he is retired and lives nearby, so could easily arrange to see us. He also posts a lot of unpleasant racist/lgbt-phobic stuff on social media, and is not someone I'd choose to spend time with otherwise.
AIBU to not make an effort, as in my mind it is not my job, or am I depriving DC of a relationship with a great grandparent?