Buddha was basically rationalist, and would tear Jesus apart in a debate.
Buddha specifically taught that your own human mind is the ultimate judge of what you should believe. He said that his followers should absolutely not accept anything that he said on faith because of who he was, and that they should very carefully consider his words, try putting into practice his suggestions, and verify for themselves what works and what does not work, discarding everything that does not work.
He specifically argued that authorities of all kinds should not be accepted because of their authority, and that it is the responsibility of each one of to verify and refute for ourselves.
Here's a representative quote from an early Sutra that purports to be what Buddha told his followers:
Believe nothing merely because you have been told it. Do not believe what your teacher tells you merely out of respect for the teacher. But whatsoever, after due examination and analysis, you find to be kind, conducive to the good, the benefit, the welfare of all beings — that doctrine believe and cling to, and take it as your guide.
O monks, just as a goldsmith tests his gold by melting, cutting and rubbing,
sages accept my teachings after full examination, and not just out of devotion.