I don’t know if I can explain, and others may be able to explain better, but for me, the crucifixion of Christ is not something to be mocked, made light of, laughed at, and included in tasteless jokes/cartoons. The crucifixion of Jesus (and others) was horrendous, the worst torture anyone could imagine. To turn this into a joke, a satire, make light of it, include it in jokes or satires about others, whoever they may be, is simply in very poor taste, and yes, as it appeared on Good Friday, remembered as the day of Christ’s suffering, it makes it worse. Any other time of year might not evoke such a strong reaction, but to choose this day, sacred for many people, to display a crass and insensitive cartoon, shows a complete disregard for the feelings of other people to whom it may be at best in poor taste, at worst completely offensive.
I don’t think I can do any better, maybe someone else can.
Incidentally I’m not really a regular church goer, and I’m certainly no born again Christian, but I have a quiet feeling of the presence of something more important than ourselves, and I believe that Christ gave us a code for living, which we should try to bear in mind.
Do unto others as you would have then do unto you.
Love thy neighbour as thyself.
And so on.