That's totally true... education is an importnat step. And there's also many types of education and things to be educated in. It has been shows through studies that well educated people are generally more progressive and are more open to new ideas (and seeing that new ideas are even needed).... that prejudice can be at least partly overcome through exposure to other perspectives and cultures.
It's also worth qualifying that education and what that is handed out at many institutions of "higher learning" are not always the same thing. There is overlap, and it's really different for each individual student, but it's safe to say that many people with small world views and big prejudices also went to those institutions. Sometimes institutions are only best at perpetuating a status quo that benefits them... but that's a whole other discussion.
It can also take generations to change ideologies... so this isn't a quick fix...
IMO, there is no such thing as objective truth. It's all cultural baggage and ideology. The best we can do is be aware of our own biases, own up to them, and be open to changing them when appropriate. We should also be willing to hold on to them in the right moments.
It's like a partial relativism ... not going so far as to say that anything can be right given context, but far enough to be open to the fact that you might be wrong.
Ideology as a concept isn't inherently bad... it's just that many of them have built in protection mechanisms that hurt people and stifle progress. I don't think it's crazy to say that some ideologies are "better" ... ones that aim to avoid hurting or subjugation others are "better" than ideologies that actively hurt people. It's a tough argument to take to logical ends... but history has shown that generally the side of compassion, human rights, and making the world safer/cleaner/healthier tend to win in the long run. In the short term it can look like there are other winners, but ultimately they seem to bite themselves in the ass, so to speak.
Anyway, it's probably too late at night for me to write things like this and make any sense, let along delve into the philosophy of objective truths
Some reading that's better than what I can write: