all in or not?

Hi i was playing in a £30 freezeout at and it was 5000 chips to start. The blinds where 400/800 and i was in the big blind and i had 4000 chips left. Everyone on that table had been raising or going all in with raggy ace. There were six players on the table and the first one folded the second raised to 3000 chips and the gentlemen after him went all in for 6000(he was a maniac player who would go in with anything)The others folded round to me I was holding AK suited and the gentlemen who made the 3000 bet was looking nervous he had 2500 chips left. I said to him you better be able to beat kk and he went red in the face so i went all in. The first man had QQ and the second Jt the qq held and i was out but i did put my self with two overcards and the blinds were going to go up in 2 mins was going all in the right thing to do or should i have folded?