How can I make these natural?
Many of these discriminatory beliefs had been institutionalized through tradition.
Those who will help themselves will succeed.
The outcome of helping people makes us feel better.
Helping people can help us momentarily connect with the person.
Those who idealize a paradise where everything is perfect, can be fatal once they impose that idealization on others.
The gender discrimination towards Indian females involve bias, harassment, prejudice and disgusting generalization.

Question

How can I make these natural?
Many of these  discriminatory beliefs had been institutionalized through tradition. 
Those who will help themselves will succeed. 
The outcome of helping people makes us feel better. 
Helping people can help us momentarily connect with the person. 
Those who idealize a paradise where everything is perfect, can be fatal once they impose that idealization on others. 
The gender discrimination towards Indian females involve bias, harassment, prejudice and disgusting generalization.

Answer

Many... OK.
Those who help...
Did you mean: The outcome of helping people is to make us feel better. ?
Helping people can help us connect with the person. (Momentarily is not a good word, I think. It usually means literally seconds, which I think diminishes the meaning of your sentence)
Those who... Did you really mean 'fatal'? As in 'will kill'? That's very strong. 
Also the grammar is wrong: 'They can be fatal'. People are not fatal. Actions can be fatal. You need to rephrase it.
'Disgusting' and 'generalization' don't really go together. One is extremely strong, and specific, and the other is very non-specific. I can't think what you mean by those two words. Perhaps an example would help?