Do you have any historical evidence of why you think so? Im afraid I disagree that good was already established and religions followed it and also claimed it.
Some examples : the Qur'an was revealed in AD 610 to 632 during Prophet Muhammad's life. He spoke of liberation of women in a society and rights for them, such as rights to divorce, inheritance, education, and many other things. He was a MAN fighting for the rights of women in a society that treated women worse than slaves.
In 1923 : about 1300years after the Qur'an was established, the English law allowed divorce of grounds of misconduct alone, whereas Islam allowed this right 1300years ago. There are a lot of other laws that came from Islamic law if you look into the history of things.
Below is the book for reference. It's a short read and very interesting.
www.alislam.org/book/muhammad-liberator-women/
Wrt to homosexuality, yes as Muslims we don't agree with it, but there are 2 fundamental principles in Islam - 'hakukullah( duty to God) and hakukulibad (duty to fellow beings). Meaning you must treat everyone with kindness and respect, thus I may not agree with their way of life but I will still respect and be kind to them as they're God's creation. Same with the Jewish community - as a lot seem to be commenting about them also here.
Unfortunately what you see as some Muslims abusing gays and Jews, are themselves far far from the actual teachings of Islam, therefore if you want to judge look into its teachings rather than examples of so called religious people.