If a joke or meme turns out to be Kufr but the person who said it avoided the part which was kufr but others got the implication that he is saying that specific joke or meme and they end up saying it with the kufr part. Is this kufr on the original person who said it ?

Ustadh AbdulAziz al-Haqqan

You suffer from waswas obviously, so pay attention to that. As for such jokes stay away altogether from this and never ever do such a thing ever again and never sit with anyone who does so.