Islam is like Christianity except its still in its adolescence. Look at Christendom around the 1400-1500s. That`s where Islam is now.

that's a tie as far as I'm concerned

In this century, Islam hands down,
thousand years ago, I would have said Christianity.

Basically they are both the same.Same book just different histories.

All of the fundamentalist religions are awful. The non-fundamentalist versions of Christianity, Islam, and Judaism are silly but generally innocuous.

Horrible- both of them. All about subjugation of women, and freaky control, control, control.

All of them..

If you read the books, Christianity is worse. If you look how they're behaving on the global stage at this very moment, Islam is worse.

Both are horrible enough it matters little.

All religion is intellectual poison. There's no such thing as a good religion.

Before Muhammad , I would have said Christianity , but if you look at the world today Islam wins hands down .

Both horses have jaundice. As do their kin.

I'd have to say Christianity here in the west as it affects far more people than Islam but it was no easy choice

Probably Islam given how volatile it is. Christianity is pretty terrible in its own right, but it has had a lot of time to be de-fanged and become more benign that it was in the past. Now even after all this time, Christianity still has a lot of problems, but religion is still fundamentally toxic.

Islam never really had its enlightenment or anything in that regards, it still has a lot of social progress to catch up on to be on par with most of the modern world. When the crazier denominations still hold the most power, it's always gonna worse off.

Both suck, but Christianity has a more direct and negative impact on my life.

I think they're both terrible.

Both have had their share of murderous campaigns in the name of someone’s holy proclamation.

Both.

No difference, same meat different gravy.

Worst? Define worst. They're both belief systems.

Christianity. In my lifetime of experiences, they've been tje worse at lying, cheating..actually all of their "deadly sins"... Maybe it's because their " God" will forgive them... I have many Islamic friends and find them to be very loyal, honest, forthright, and giving of themselves.

You only gave two. I agree they're two biggies but might I offer another? I would submit the cult of personality. Within the 20th century there has been a huge pile of bodies burned on the sacrificial fire of ideology. I am referring to the unholy trinity of Hitler, Stalin and Mao. To me, the substitution of state-ism for religion is mere semantics.

I don't think either is bad, I think that just like atheism there are good and bad people

At the moment I put Christianity as worse. The "fanatical" are so hyperfixated on demonizing all who don't do exactly as they do, they become worse than the things they are obsessed over ie; Sharia law....or those 2 Mom's in AZ teaching their kids religious hatred. Then there is the abhorrent behavior of abusing spouses and children while simultaneously demonizing GLBT and single parent households

U mean worse not worst given a mere 2 choices, I think

The Nazis thought they were the chosen and exterminating the jews was just doing gods work.
In the americas the genocide of the natives was also out destiny as ordained by god.