I already addressed that. Take a look at the numbers. They make your position untenable. I do not find all non-Christian religions abhorrent. For example, I find Buddhism quite peaceful, although I know that Buddhism is not the way to salvation. Islam is disgusting because it promotes violence against non-Muslims, child sexual abuse, sex slavery, etc. Hinduism is a disgusting religion because it separates people into classes. The lower classes are destined to daily humiliation for life. Hinduism also prevents people from eating cows, even if both cows and humans are starving. Hinduism is detrimental to mankind. However, Hinduism is infinitely superior to Islam in all respects.
Nevertheless, it doesn't pay to whitewash.
As for what you say about Hinduism: I thought that might be what you’d come across. I unreservedly am against the caste system. A great many Hindus are. Mahatma Gandhi, for example, was one of the most famous modern Hindus and he stood strongly against it. So did many religious teachers in the history of the Hindu traditions (Chaitanya, Ramanuja, Ramananda, Vivekananda, etc), and it is fortunately being eroded in India today. The caste system does linger, of course, but it does so amongst Muslims, Buddhists, Jews, Zoroastrians, Christians and Sikhs in India as well as Hindus. As for the cows – some Hindus eat beef, some do not. I think the vast majority of those who do not do so would think it acceptable to eat a cow if you would die otherwise. I would certainly take that stance.
EDIT: Also, I'm going to reiterate that every Muslim I know is against violence against non-Muslims, against slavery (sexual or no) and against child sexual abuse and child marriage.