Christian missionaries assert that since Jesus will judge people, he must be God

For the Father judgeth no man, but hath committed all judgment unto the Son (John 5:22)
And hath given him authority to execute judgment also, because he is the Son of man.(John 5:27)
So the missionary asserts that since Jesus will judge people, he must be God.First of all, the verses in question refute any argument for divinity;if you read both of the above quoted verses you will find that it is God who gives Jesus the right and authority to judge.

That in itself proves that Jesus is not God, because had he been God, he wouldn't have needed someone else to give him the right to judge, rather since he is man, and not divine, God gives him this right as a blessingand honor.

Secondly, there is something called context.To begin with, we know that Jesus does everything according to will of the God, for instance Jesus does not do things according to what he thinks or feels, rather he does things which is in line with God's will.So when Jesus does judge the people, Jesus judges the people in line with God's will, not his own, as Jesus himself says:

I can of mine own self do nothing: as I hear, I judge: and my judgment is just;because I seek not mine own will, but the will of the Father which hath sent me.(John 5:30)

So when Jesus judges the people, he judges them not according to his own judgment, rather he judges the people according to God's will.Hence you can already see that it is already God who is in real control, not Jesus, because Jesus simply judges on God's will.

For instance in Islam we believe the Prophet Muhammad will intercede for the believers, yet the Prophet Muhammad is given the right to intercede, and he can only intercede for those who have been given permission to be interceded for, and those who can be saved byhis intercession can only be saved by God's will and permission, hence in reality all the power of intercession is in God's hand, the Prophet Muhammad is simply having the honor and blessing of carrying the task out.

The same goes for Jesus, he will be judge, but he is given the right to judge, and he can only judge those who have been given permission to be judged by God, and his judgment cannot be his own personal judgment but rather must bein line with God's will, hence in reality all judgment is with God and not with Jesus.This is exactly why Jesus said the following:

I judge no man.(John 8:15)

How can Jesus judge no man when he says he will judge people?Is this a contradiction?Yes, Jesus will judge people, but he is given permission to judge, it is not his own right and power, and on top of that Jesus will judge people according to God's will, not his own, hence in reality all judgment is with God, not Jesus, and this is precisely why Jesus eventually says he judges no man.

Last but not least, the disciples themselves will sit on twelve thrones, judging the people:

And Jesus said unto them, Verily I say unto you, That ye which have followed me, in the regeneration when the Son of man shall sit in the throne of his glory, ye also shall sit upon twelve thrones, judging the twelve tribes of Israel.(Matthew 19:28)

Just like Jesus, the disciples will sit on their own thrones of glory, and just like Jesus, they too will judge the people, so using the missionary logic the 12 disciples must also be God, and therefore we end up with 15 Gods, theTrinity, and the 12 disciples.

Obviously this cannot be, but if we were to take the narrow interpretation as some missionaries do, then that's what we are left with.