Rental Agreement Laws

I'm on a lease from month to month, and the agreement concluded by the owner stated that the termination, notice of intent must be 30 days. But state law, here in Delaware that "the landlord must give a minimum of 60 days notice if it intends to terminate an existing lease agreement." As we all both signed the lease stating the 30 days, is it legal or does it comply with the law of 60 days?

Two parties have reached an agreement to allow 30 days notice to move. This is an agreement signed valid. You agreed to it.
The landlord evict you? Removal and expulsion of two ball games. If they evict you, which could be where the law takes effect 60 days. By giving you 60 days to find another place to live. If you move, you give 30 days notice.
I would check the status of the new law, because generally the 60-day rule is for a one year lease, one month to another.

generally the state law is the rule. He could not, t make a contract that allows him to steal from you is, could it?

State law is always what you spend. You can not write a contract that violates a law.

One lease is a contract and an essential element of a valid contract is the law. Since the state law differs from that contained in your lease contract - the law of the state is the rule and replace the provisions of the lease.

A common example of this concept would be a lease in which the tenant waives its immunity or firm agrees to a "loser pays" arrangement for legal fees in states where the law says you can not do one or the other.

Although the notice requirement exceeds the duration of the lease, I looked Delaware L / T and the law is very clear that even monthly leases require 60 days notice. Unless you both agree that 30 days is mutually acceptable, or you have the legal capacity to insist the agreement terminated in 30 days. In other words, the owner can not force you to move with a notice of 30 days and you can not move 30 days notice if the landlord refuses to accept it - regardless of what the lease says.

Bottom line: Just because it is in the lease does not mean it's legal, which is why most societies have their rental leases periodically reviewed by lawyers to ensure they are conform to the current state, local and federal law.