I don't think you really want to "escalate" the situation, although there is nothing wrong with asking for the community to take a second look if you feel like a question should not have been closed.
As a general rule, the best way to get your question reopened is to revise your question. Many questions get closed because they are written in a way that makes it look like the O.P. hasn't done enough research, and it looks like they are asking on ELU before looking in a dictionary.
(Sometimes this isn't really true, but the best way to handle the situation is to strengthen the question by including your research, as opposed to getting into a drawn-out debate in the comments.)
As a footnote, Andrew Leach and I joined the ELU right around the same time, almost three years ago. I've never known him to be biased, patronizing or condescending; his actions always seem to be fair and level-headed. That said, I've witnessed several instances where remarks that were meant to be helpful nudges were misconstrued or misinterpreted as personal attacks or criticisms.
Evidently, some comments have been removed before I had a chance to read them, but, if you really feel like Andrew Leach was condescending toward you, I'd be willing to bet that was purely a misunderstanding, and that Mr. Leach meant to be only constructive and respectful in his duties.
One other thing – I don't know if you were put off by the initial remark when the question was closed. Several times I've seen people get into a "huff" because they thought those words were condescending, when in fact they were only automatically copied from a standard phrase found in a Stack Exchange template: