I don't know about you but this might not have been the best color.  It is kind of like going into the cripts territory wearing blood coloers.

Dont the Palestinian Jihadists have red and white scarves?

Could you have been sabotoging your selves on a subliminal level?

Hi Chad.

Jews for Jesus typically wear t-shirts, identifying who they are, while passing out tracts. The t-shirts come in different colors, so chances are, the red t-shirt you saw is one of many different t-shirt colors.
Most of the Jews for Jesus staff in Israel were born in Israel (Sabras) so they should be familiar with some of the sensitivities.

Red doesn't have only to do with that kind of blood anyway.
On Yom Kippur is it forbidden to wear Red. Also according to the LAWs of Tzniut (proper dressing-code) a Jew shouldn't wear the red color...
Of course it happens here and there... But If I sit in the bus in Jerusalem I hardly see red. also not when I meet Brooklyn-Jews or Jews from London...
It is not a Sabra issue. But an Halachic issue.
So here it looks like Messianics don't know all the sensitivities in the religion of Judaism. or they have just more (sometimes provoking) liberal viewpoints.

As I said, Sabras, native born Israelis are familiar with the sensitivities of the Jewish people in the various cities in Israel as to what is considered proper dress, and even where and when the Haredi have made their dress code mandatory for all Israelis.

In my own experience in the U.S., when I have been walking down a street wearing a t-shirt which says I am a Jew for Jesus, I have never had a black hatter object that the color of my t-shirt is too bright.

Jans,

Do all the people who work as street missionaries for Jews for Jesus have to be Jewish, and if so, was this always the case?

I came across an opinion piece by a rabbi in one of the Israeli newspapers, and he said that two J4J came to his door, introduced themselves as J4J, but that they were obviously not Jewish. I am assuming the rabbi is being truthful, since his case would have been stronger against J4J if the two witnesses had been Jewish. But it made me wonder since I was under the impression a J4J street missionary had to be Jewish. Can you clarify?

Jans I understand,

It's not a big issue.
Haredim should say less about somebodies dressingcode or speak less bad things about people although they do... It's just not the first thing to speak about...

For example for woman. The thing that woman should not wear short sleeves is more important than the colour red... But it's mainly your private duty... I can't tell other Jews all the time what they might misunderstand/do wrong...

There is a Halacha that woman should cover their hair. But in Europe and the states it became even common that not all orthodox woman cover their hair.
There is also a Halacha that you should not be provocative more pious than your parents, even when your married. So a daughter that might start to wear a wig or hat, is sometimes said by rabbi's not to do so in front of their parents always...
Respect for the other is sometimes just as important as Halacha.

A red shirt is just more provocative, that's all. That a Haredi or Yeshivische or a Conservodox doesn't say a thing, is not a mesurement that he agrees. It's your responsibility how to deal with it... It's just less sensitive. I don't blame you or say that it is the worst thing in the world...

But red in Judaism is blood. So I responded on the remark of palestinian blood. But it's more a Yom Kippur tradition etc. in my eyes. And than, why is it written, no red on Yom Kippur (scapegoat), if for the rest off the year people where not wearing red anyway??? It's written in a time that some people where wearing red... So you make a strickter ruling for Yom Kippur.

Be well and happy, even in a red shirt.

Jews for Jesus has a requirement that missionaries who work for Jews for Jesus be Jewish or when both husband and wife are on staff, one has to be Jewish.

Sometimes a few Gentiles believers volunteer to help out and work with the Jews for Jesus missionaries passing out tracts or going door to door. If they are wearing t-shirts, Gentiles wear a t-shirt which indicates they are not Jewish. Gentile volunteers would be out with Jewish believers.

My suggestion would be to stick with white t shirts, which seem more Jewish, even to me as an outsider who doesn't know too much.

Sometimes outsiders can see things people wraped up in the machine are oblivious to.

Also, in Judaism, everything means something and has significance.

Do not eat blood actually reads do not eat over the red the stone edition Humash says.

You could wear red, but it needs to have meaning.  It could be for makeing a point.

I think I have a spiritual gift for administration.  So if it seems like where ever I sit is the head of the table, don't be offended, I can't help it.